for the last few days, I've been having a dull pain in the right-hand side of my chest that seems to radiate into my shoulder and a little in to my back.
I'm 18, usually in good health, except about a month ago I started violently coughing all the time, so I went to the doctors and got a chest x-ray (came back clear) and I was put on antibiotics for a chest infection. The cough then seemed to go away but then came back again about a week later just as bad as it was before, I then began to cough up green mucus and after about another week the cough cleared itself up again (and hasn't really come back since).
But it was about 2 days ago, I was doing sit-ups and I twisted my body and felt this dull pain right through the right-hand side of my chest and in my shoulder. And since then I've noticed it when I lay on my left-hand side I feel the pain on my right, and I feel it when stretching the right side of my body.
All these problems with my chest have just started to worry me lately, and I was wondering if anyone could put me straight and maybe tell me if this pain is anything to worry about. Thanks in advance.