 I am 20 years old, and up to my time in high school and also last year of work, I never suffered from anxiety (especially physically) in fact I didn't even know what it was practically. 

Then a lot has happened in the last few months, I broke up, I changed jobs, and especially an accident happened, On August 15th, I unconsciously mix a medicine (for allergy) and after smoking a joint, I start having a bad trip. , which led me to a sort of temporary derealization of about (3-4 days) 

   
From that experience something had changed in me, I felt very often pressure in the chest, blurred vision, dizziness that I did not immediately relate to anxiety but probably to my low blood pressure, but I was wrong. 

   
Now I have started a psychotherapeutic journey, to try to defeat these demons in my head.  I no longer feel myself, the sunny and productive person that I was, has faded a lot.  How could this have happened I ask myself again ... I swear to you that I have never suffered from all this, it exploded like this and I feel that my life is shattering.