hello im a 19 year old male, i stopped smoking about 3 months ago, i was a smoker of about a year and 4 months, before i finally kicked the habit, i was seeing a tremendous amount of change in my health and became crazy with anxiety. my worst fear is someday getting a heart attack, i live in constant fear of it, even small pains cause me to fear, just recently i started to get a sharp stabbing pain in my left chest slightly on the lower part of my ribs. i am afraid to breath in to hard as it hurts with breats, the deeper the breath the sharper the pain. but when i fully breath in and hold it, the pain goes away, ive been getting this for the past week, it has occurred before but just now it has been on a daily basis, i cant go about my day without getting the pain,they also sometimes occur higher up the chest near the center. i also get minor shoulder tightness (but seprately from other symptoms) and dull tightness in the middle of my chest (also slight pain and tightness in right chest). i am worried sick that i might get a heart attack. it makes me have depression on a contant basis. help me please. i dont have health insurance, so i cant afford to get a check-up. i will try soon though. i am so scared, thanks to all.