I Have Been Having Pain Ever Once In Awhile For

I have been having pain ever once in awhile for a couple of months that starts at my belly button and shoots down to my vagina a very sharp pain the sharp pain last about 5 mins or so and then it hurts if I turn or sit a certain way and that will last for a couple hours and it fills like something is tangled up and when I more the wrong way it is pulling it.....is this normal or should I be worried??