I agree with Linda that it sounds like anxiety. You panicked when it first happened and now you over react to everything. It's happened to me and you just have to try to relax. One other possiblility might be an inner ear virus. I had that one time quite a while ago and I was so dizzy I felt I couldn't even walk straight. The only thing the Dr. could give me was motion sickness meds

. You've had the tests done and checked out ok. Try not to worry; it just makes it worse

.