could i (still) be having Angina?

Hi..Its nearly a week m having pain in my left chest. The pain is not so sever...it comes and goes (stays max for 20sec to 3 min). My entire left arm, shoulder, sometimes neck till the jaw line hurts. I also experience difficultly breathing. I had breathing prob and chest pain earlier in january this year too. Earlier the doc said it maybe due to stress and it just passed like that after few medications. But this time i feel its more severe compared to the earlier episode. I visited the doctor (another) again and he "suspected" me of having Angina but since i am thin and my Bp (100/70) and pulse rate was normal he just advised me to exercise. He aslo perscribed me pills for Gastric (if the prob is due to gas) and ask'd me to visit if no improvement. I visited again today since the pain dosent seem to go. I took ECG and report was normal. So he prescribed me painkiller--Zerodol(acelofenac+pcm).

M on pain killer now but no much difference. I am glad that i dnt have a serious ailment (like the doc said) but my confusion is that even after painkiller the pain dosent seem to subside much. Another thing is what could be the possible reason then? should i have pain killers everytime i feel the pain? like 5-6 times a day or so...:| :'( :'(