<human>: Give me a shortened version of the text

30 year old male here....Over the last year I've felt a real degradation of my health.  A few things really bother me:

First - whenever I have to cough I feel like it is blocked, or something in my neck is not allowing me to exhale the cough the way I would like to - or used to be able to.  This bothers me a lot and sometimes when I take a deep inhale to cough and try to exhale the cough I see stars....

Also I've been having sharp chest pains every few days.  Some are so bad that I grab at my chest.  The pains are on my left side (heart...) and above the nipple on my chest.

I smoke grass pretty often, but I'm not a cig smoker or heavy drinker.  I would say I smoke about 3 times a week.  I exercise 2 - 5 times a week, I'm maybe 10lbs overweight,  -- but I would not consider myself living a very unhealthy lifestyle...

I've been to doctors who really have no advice for me - they have given me ECG and tested my blood etc...

Is this something I should be worried about...how far should I take my concerns
<bot>: I can't cough the way I used to and I have sharp chest pains sometimes...had a few tests and nothing came up...Any advice??