What are some possible reasons that my insides hurt when i am having intercourse?

Female?: It sounds like this is deep (vice superficial pain) have u had surgery (adhesions), ovarian cysts, urinary tract infection, std endometriosis, hx of uterine fibroids or pelvic inflammatory disease, is your uterus tilted toward the back ? There are many possible causes. Please see your gynecologist to evaluate for cause. Often correctable causes can be identified.