I just got over a sinus infection and during the sinus infect I started to have back pains which was caused from coughing... Well my Dr. Prescribed me antibiotics and the sinus infection is gone. Now I am having lower rib cage pains, it hurts really bad to sleep on it; it almost feels like an internal bruise but it's not. When I got to leave class and I have to pick up my heavy book sack it really hurts bad; especially I sit back against a hard chair. Please help. Comment if you have had or having an similar problems...