This is the 2nd night in a row where I've woken up around 1:30/2am with a sharp pain in my vagina. Almost like my bladder, it feels like i have to pee. Its that pain when you hold it for too long, so i pee and its not that much. Then it starts to get worse and its pretty painful. It last about 15-20min and then I'm fine. What the heck is happening?