I completely understand where you are coming from because I used to feel this way myself. I started when I was a toddler it quit for a while and by the time that I was ten year old it was getting bad and by the time I was thirteen it was really bad by then. I was scare to be breathing the next five minutes. Just live your life to the fullest the way you want to live. Ask yourself what will you miss the most and then do it?