Thank you marc. Doing some reading here made me feel less helpless.
You are right, I would consider myself as an anxious person.
However, I really start to believe that for me the symptoms are mostly psychological. The best time I had during the last 3 Months was a noisy and busy night out in a club with some good friends (no alcohol involved), during which I was free of symptoms. I guess, I am not like most other pcs cases...