Soreness down there

I have been feeling pretty sore down there for the past 4-5 days. I notice it most when I am turning over in bed, getting out of bed, spreading my legs & sometimes even when I’m on the toilet. I woke up last night to go pee & once I stood up it hurt so bad to walk that I was holding my crotch to make it feel a little better lol. I‘m definitely going to bring this up to my OB, but in the meantime has anyone else experienced this & found out what it was from? I was wondering if this could be due to my baby dropping, varicose veins or maybe even my body loosening up & preparing for labor? I am 30 weeks btw.