how can I put an end to anxiety attacks?

That is a problem… It is good to talk to your Dr. about this. Ask about a medicine that Might help you. Maybe after a while you won’t have to take the medicine anymore because you aren’t worried about it anymore.
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Limit "worrying time" to 30 – 45 mns, daily, possibly when you get home, or after your evening meal, but not too close to bedtime, after which, resolve firmly to refuse to worry again on that day. Understand that to do otherwise would be counterproductive to your mental health, and enjoyment of life. Having had your "worry time" for the day, you can just write down any more thoughts that come to mind, and say to yourself: "Well, I’ll just have to worry about that tomorrow, won’t I?". It’s important to regularly monitor, and deal with a negative internal monologue (self talk), or mental process, such as disturbing thoughts, images, impulses, or emotions, by the process of (a): recognising it, and (b): challenging it immediately. Technique For Re-Programming Negative Thoughts: When you notice something negative, such as: "I can’t do this/ am never going to get over this!" or: "Why am I always so useless/such a loser?" or even an image, emotion, or a memory; recognise that it is being generated from the negative part of your mind. After identifying and labelling it, visualise a large, red, flashing, "STOP!" sign, and/or possibly a stern faced person wagging an index finger at you in a negative manner, then say to yourself as forcefully as you can, even aloud in a big voice, if alone: "I know this tactic: GO AWAY FOR A WHILE !!!" You may want to use either: "ruse", "ploy", "game", or "trick". In the case of an image, visualise a large "STOP" sign, or your preferred version. Some people go so far as to keep a wide rubber band in their pocket, then put it around their wrist, when they catch themselves backsliding, stretch and release it, as a method of reprogramming their mind sooner, but I don’t regard it as being strictly necessary. Remember to remove it, afterwards, if you use this method. Try replacing a negative thought with a positive affirmation of your choice, like: "I am a unique individual, with my own set of skills, and good points", or "I may not be perfect, but I’m doing the best I can, right now".

Practice a relaxation method, daily, and when needed, such as http://www.drcoxconsulting.com/managing-stress.html or http://altmedicine.about.com/cs/mindbody/a/Meditation.htm
or http://www.wikihow.com/Meditate and/or Tai Chi, Qi Gong, or yoga. Give the EFT a good tryout, to see if it helps you. It is free via the searchbar at http://www.mercola.com "EFT" & "EFT therapists" or http://www.tapping.com (13 free videos). Professional is best. – There is a version for use in public places, (if you like, you can claim to have a headache, as you massage/lightly tap your temples, but you would then be restricted to subvocalising: saying it to yourself in your mind: "Even though I have anxiety, I deeply and completely accept myself." Herbal remedies, such as chamomile, passionflower, or St. John’s wort, are often effective, but the idea is (as with anxiolytic medication) to use them like water wings, or training wheels on a bicycle, providing initial support, and giving time for other treatments, such as therapy, and relaxation techniques, to take effect. See http://altmedicine.about.com/cs/conditionsatod/a/Anxiety.htm Imagine, as vividly as you possibly can, that your concerns, anxieties, worries, fears, your self-recriminations, all the agonizing "I’m-so-Stupids"; every painful "I-can’t-do-it", etc., are huge raging, hurtful bulls snorting and charging at you. You see them coming at you and you hold out your red matador’s cape at arms length and simply let them charge right by. Every time they come at you, hold out your arm with the red cape and let them rage and snort and go right on past. A free E course in CBT is at: http://ecouch.anu.edu.au/welcome 85% of people are suggestible, to some extent, so consider professional hypnotherapy, or more alternatives along such lines are at http://your-mental-health.8m.com/blank_8.html
References :
Try your bookstore, or Amazon.com for these books: Natural Relief for Anxiety: Complementary Strategies for Easing Fear, Panic & Worry by Edmund J. Bourne, Arlen Brownstein, and Lorna Garano, & The 10 Best-Ever Anxiety Management Techniques: Understanding How Your Brain Makes You Anxious and What You Can Do to Change It by Margaret Wehrenberg, & Managing Anxiety. Kennerley, Helen. (1995).

Seek some professional help. You don’t have to do this on your own and you certainly don’t have to put up with the stress. Be kind to yourself
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All anxiety is caused by fear, we all get anxious at times. keep a diary about your thoughts so you can look at things objectively. I do when i feel anxious. talk to someone on a helpline it will make you feel better. try to put your mind on other things read your bible. Perfect love cast out all fears, give your worries to God. he,s the best at sorting them out. read some books on confdiance building, talk postive words to yourself. It will take time but you will get better.
References :
joyce meyer….. The confidant woman. http://www.joycemeyer.com she is brilliant

I have had GAD {generalized anxiety disorder} all my life.You should read Paul David At Last A Life he recovered after 10 years.The basis of coping is to stop fighting and do nothing just accept the way you are.You will stop making so much adrenalin which in turn will reduce the horrible feelings.There is no overnight cure or magic pill for this condition but you can greatly help yourself.Another good self help book is Claire Weekes Self Help For Your Nerves this will give you a greater understanding of the fear adrenalin cycle you are in.Also take a look at Paul Davids website anxietynomore and also go to anxietyuk.org there is lots of help and info for you there also helplines people you can talk to all of them have had this condition so know what they are talking about.You can help yourself arm yourself with knowledge and your life will be better.
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Life long GAD nearly a pensioner