What are some techniques that can prevent be from having bad anxiety or such as having a panic attack??? what is the best solution to do??

Panic Attacks: are always self-limiting. Please remember that. Seeing a mental health professional is best. Learn to manage them and don't use medication alone if you use it. See www.relaxationresponse.org for some self-help. Your situation is very treatable. Peace and good health.

Therapy?: Have you yet tried any form of psychotherapy? Typically, the optimal combination of things to treat emotional issues such as symptoms you describe is medication (which, on your best day, is supposed to take the edge off symptoms) but the real gruntwork takes place in psychotherapist's consulting room.