Angina chest pain. Is the pain cardiac?

So i once had chest pain which was very mild and was localized in a very small area on right side of chest but was consistent for like 18 hours or so, i had an ecg done which came normal (sinus tachycardia - was having severe anxiety)and next morning pain turned too MUCH SEVERE, i was not able to deep breathe(due to pain not breathless) wasnot able to lie on bed and or sit in on chair but taking pain killers reduced the pain , idk if it was pain killer or just an placebo, so i ran too an cardiologist again had my ecg, echo,chest xray,blood test done everything camenormal except ldl, very high ldl.he prescribed pantoacid andpain killer, and pain vanished within 2 weeks completely but now after like 50 days i felt the same pain on my chest this time on left side plus i was having excessive sweating (i live in humid area) idk if it was due to climate or chest pain, but the pain was mild but with movement like twisting my chest incresd pain, is it angina,ecg -normal, is the pain cardiac???