Creepin gym teacher thinks everythign is fine...?

Okay so in gym we are playing floor hockey with oversized sticks and a small area. One side of my stick hit the wall and the other went into my gut ( under chestt like that little spot that has nothign there) and ever since ive been in pain and I cant put pressure on it or anything! Also my chest hurts to cuz of it and right below the spot. What should I do? Could this be serious? Ive been breahting okay it just hurts and im afraid to do anything! help!