Collar bone injury?

Hi I’m new here, I’m just a wee freshman so hi I guess. Well as of lately I have thrown every day during and after school for a week now. I think I have clean mechanics. But, my collar bone is hurting, like a weird pain, like someone is pressing on it. My elbow and shoulder are fine and good, but why the collar bone? Is it a hairline fracture or is it just strained or something, and today was the first time it started to be a sharp pain.

Sounds like you need to get checked out by a doctor.