It's painful to have sex, the doctor told me I have a tilted uterus now, I don't know if its because I had a c-section or not. No std's or anything.?

Dyspareunia. Alterations in anatomical relationships within your body may occur with any form of surgery, due either to the procedure, to scarring or weakening of supportive tissues. You don't indicate what the doctor suggested. You should not have to tolerate severe pain with sex. There should be means of correcting this. Best of luck.