Painful pubic bone and lady bits?

I'm 20 weeks and over the last two weeks or so have had soreness and sensitivity along my pubic bone/bikini area and vulva.  Actual vagina is totally fine, and I'm having no symptoms of like yeast infection or anything like that...just soreness that makes it painful to wear pants or walk.  Feels like deep bruising, kind of.  Like after a night of rough sex (but that's not what this is, lol). 
What the hell is this, has anyone else experienced it? I'm a FTM so totally clueless if this is normal or not.