TMI: so I was having sex and it hurt afterwards but the pain usually goes away but it didn't I went to use bathroom (not…

TMI: so I was having sex and it hurt afterwards but the pain usually goes away but it didn't I went to use bathroom (not peeing) and I pushed and as I did that a painful sensation happened in pelvic/ vaginal area... I jumped in bath tub and it hurt worse for a little then calmed down but still hurts... what's going on. kinda feels like my whole pelvic is opening