Sore sore sore D:

My inner thigh up by my crotch was sore earlier and so my groin area. Now its just my groin area and vagina ! It feels like I just had hate sex. Or whatever. But I haven't been sexually active for weeks. It doesn't seem to be going away. Not super painful just not getting better. Could it just be my muscles or ligaments ? I'm 30 weeks, and its been going on all day. Any advice ?