Pulled Chest Muscle? or Angina?

I was lifting some heavy lumber a few weeks ago. Since then I've had random chest pains on my right side and the center of my chest. It feels like pressure but sometimes feels more like a piercing pain.Also I think i heard my chest bone pop a few times when i stretched out. It seems to come randomly.If it helps, I'm 17 and don't eat particularly healthy. I'm just wondering what i might have.