Sometimes when I burp I regurgitate some I know this is a sign of acid reflux but canit cause some pain on the left side of my chest also?

Yes. One of the biggest differentials for chest pain is GERD/reflux. Although it is a big differential and it seems like it could match your presentation, we wouldn't want to miss anything with the heart. I would get examined either way and hopefully your doctor can rule out any cardiac cause. Good luck!