Pain in chest

I'm 23w2d and I kee getting a shooting pain that comes and goes in my chest. I have trouble breathing sometimes too. Feels like someone is laying across my chest. I know baby's feet are by my belly button because she kicks like crazy. Has anyone else experienced this and figured out what it was? I'm a FTM here due in Nkvember and have no idea what is and isn't normal. Anything will help :) thanks ladies!