pains bum and vagina

Bit of a long shot but does anyone know or has experienced the same problems as me or knows how to stop them any comments would be very much appriciated. I have had stabbing pains and tingling in my bum mainly where my bum cheek meets my thigh and around my vagina it doesn't hurt during sex but it is fairly constant also I am on my period!! Any advise would be fab or suggestions on what I should do x