I started getting a pain in myright side but in the middle only, it has only gotten worse took 800mg of ib has helped with pain what could cause this?

Lots of things: There is a long list of things this could be, from a gall bladder to pleurisy to just muscle soreness. The fact that it improved with Ibuprofen suggests an inflammatory process. If the pain returns see your physician, and tell her about the character of the pain - when it started, how long it lasted, point to where it was, why made it worse or better, and any events it was associated with.