Okay so I've been having this pain in my chest since I woke up this morning. It's like in the dead…

Okay so I've been having this pain in my chest since I woke up this morning. It's like in the dead center of my chest and I can feel it in the same spot, like, through my back if that makes sense. Idk what it could be but at times it burns, like I'm having heartburn or acid reflux but it's not strong. And then at times it hurts when I take deep breaths or yawn. Or like now for instance, I'm just laying here and there's like a tight clench feeling every few seconds. I don't think it could be contractions or Braxton hicks cause the pain is in my chest and top mid section of my back. But then again, how would I know I'm just a ftm. All I know is that this hurts and idk what to do to stop it :(