Sharp Shooting Pain in Vag?!

21 and a half weeks.... baby is head down, pressed right against my cervix as per my last ultrasound. However, for the past week or so, especially when I'm standing up, I have a sharp shooting pain that goes straight down the front of my pelvic area.  Basically down my bikini line. It HURTS!!!! Anyone else?! And if so... any idea what it is???? 😫