My name is Jerry and im an 18 year old male. After Smoking cigerettes and marijuana from age 12 to 15 i started having chest pains and shortness of breath. I'm not even sure if this has anythiing to do with it just including it in case. I eventually had what the doctors told me was a panic/anxiety attack and ended up in the hospital one day after smoking marijuana. It was unlike anything that i had ever experienced before in that part of my life. I have never been more scared. My heart was beating 180 times a minute in the hospital i couldn't catch my breath or even talk because I felt as though i couldn't breathe. The doctors thought i had done coccaine at first. They actually couldn't give me any other answer than it was a panic attack. After that hospital event I could no longer do anything. I couldn't cacth my breath, run for more than 3 minutes at a time, i started gaining weight rapidly, more than i'd ever gained my entire life actually. I also started having chest pains. I could feel my heart beating in my throat and I would get cold sweats and shiver in 90 degree heat. I felt like an entirely new person. I was confused as how this could happen. So i went back to the doctors. My doctor since i was 4 years old to present told me that it was all mental from the hospital event. He reassured me that my heart was fine and that i was getting enough oxygen. So why was i still feeling as though i couldn't breathe or even do day to day activities. I just eventually got use to having a mild panic attaqck or two a week and just got use to the shortness of breath and the heart palpitations as i call the beating rapidly in my chest sensation. just want some serious advice on this from people who know what they're talking about. Please someone it's been 3 years for me now .