Possible TMI... Sore Vagina?

Hi ladies! I'm 34 weeks pregnant and for the past couple of weeks I've been experiencing a weird pain around my vagina.. I don't really know how to explain it, but it sort of feels like it's bruised down there. It happens when I've been sitting or laying down for a while, I'm not sure whether it's from the pressure of the baby or what.. But it HURTS :( has anyone else experienced this? I'm not sure whether to be worried or not.