27 weeks 3 days....minor pain down below


Is anyone else experimenting minor pain way down low? Sometimes I will get this dull ache in my vaginal area top and a few times today I felt that dull ache in the back side. I thought it's because I sit in office chair most of the day for my job but the last time I peed and wiped, it kinda hurt ( not like UTI hurt but like an achy hurt). I have history of pre-term labor. I've been in the hospital twice in the last two weeks because blood pressure is going high and a little protein in urine but blood tests cane back negative for pre-eclampsia. Anyone else having any of these issues?