Ok im a 21 year old hispanic male, i smoked for about 2 years, at about 5 ciggs a day. I quit smoking after i started getting some tightness in my chest! It went on for 2 weeks everyday. So finally i got a breathing attack in the car and my parents took me to the hospital. They took an EKG and an x-ray of my chest! The doctor told me i was a healthy young man, and it wasnt my heart or lungs! It was some relief, then the next day i started feeling tightness and an annoying sensation again! Then i took another trip to the hospital. They also did an ekg, x-ray, and they had me hooked up to a machine to monitor me for about 2 hours! They also told me i was healthy and it wasnt my heart or anything. But still 3 weeks after the tightness and 2 hospital trips. I still have tightness in my chest, it gets annoying, and im constantly depressed, because im afraid the doctors missed something, and something bad will happen! Please help me. Thank you