Tmi topic help!!

Im 19 weeks today and yesterday I started feeling a lot of soreness in my vagina when I am just sitting still or laying down ???? It doesn't hurt to walk but when I sit I notice just an intense pressure down there kinda like if your sore from a tampon or something! Last night I was in town an walking around and it went away and didn't hurt again until I got up this morning it's crazy I have no bleeding or anything just that strong vagina soreness/pressure what is this? Should I worry?