chest pain

Mareike
I've been having sharp stabbing chest pain on my left  for the last four days. It comes and goes and gets worse when I breathe heavy or move. 
I don't have any other symptoms really besides a little cold. I have acid reflux problems and I know what that feels like, this is a different pain. Idk what to think 
I don't want to run to the doctor and have them not know what to do. Any help?!