please help FTM (TMI)

I'm 26+3 weeks pregnant & for the past couple of days I've been having abdominal pain which I've been dismissing as ligaments stretching because she is still moving perfectly normal. But this abdominal pain has also been accompanied by a sharp pain in my butt.. & I mean like literally my anus not my buttcheek. (I know, tmi) but I've never experienced this before and I'm just not sure if it's normal or not or what I should do? Any opinions or anything are much appreciated.