Is it normal i'v been geting random pelvic pain.

4 the past few years i'v been gettin random pelvic pain and it's normally at it worst when i'm havin sex oh ya i'm a girl by the way any way when havin sex i somtimes get this sharp stabbin pain in my pelvic area it really hurts i'v had this for about that past 4 years i think i didnt always hav it tho and now coz of this pain i'm limited to only certain positions but i stared havin sex less and less coz i feel theres no point if i can't enjoy it the way i used to i don't hav any STD'S OR STI'S othere than i suffer from recurring urin infections witch i don't think they hav any thin to do wiv it but this pains i just want them to go away so i can b myself again.