Ok, that information clarifies things for me greatly.
It's impossible to diagnose someone via JustAnswer but based on the information you have provided so far I would suspect that you are in fact suffering from Panic Disorder and not GAD. The core features of PD are repeated panic attacks and persistent fear of future attacks. This seems to match what you are experiencing. Panic attacks can start for a whole range of reasons and a frightening medical scare would easily explain the initial development of the problem.
The good news is that PD is very treatable and medication isn't actually recommended as the first line approach - so you can stay away from the meds!
Cognitive Behavioral Therapy (CBT) is widely regarded as the gold standard treatment for Panic. CBT is a psychotherapeutic approach that aims to solve problems concerning dysfunctional emotions, behaviors and cognitions through a
goal-oriented, systematic procedure. CBT is technique-driven, brief, direct,
and time-limited (normally 10-12 sessions). CBT is used in individual therapy
as well as group settings, and the techniques are often adapted for self-help
applications. I would strongly encourage you consider CBT as a treatment option
as I would expect you to benefit greatly from this approach.
I would suggest you start by taking a look at this excellent CBT based self-help program here. It will teach you everything you need to know about anxiety, panic attacks, panic disorder and what you can do to manage your own symptoms. I use this material with patients regularly and I find it to be very helpful. Alternatively you can access some published CBT based self-help material to learn more about using CBT techniques. I can recommend the book Overcoming Panic. A Self Help Guide Using Cognitive Behavioral Techniques, you can find it here .
If you decide that you need further help getting it all under control then I would suggest you consult with a CBT trained therapist. CBT is usually offered by Clinical Psychologists (although not exclusively) and you can contact the American Psychology Association for assistance with finding one near you. Take a look at the
American Psychology Association's locator service here. You can use this to find Psychologists in your area and there is a phone number you can contact if you want a referral arranged for you. Also, take a look at an article published by the APA here. It's an interview with a senior Psychologist and covers some of the things you should consider when you are looking for a Psychologist.
If you have any further questions or would like me to elaborate on any part of my answer please let me know. If not.....I wish you the best of luck!