Girls, tell me, have you been having this for a couple of days? I don'…

Girls, tell me, have you been having this for a couple of days? I don't know if it's my bowels or training contractions, it hurts on both sides of my stomach, it gets a bit hard, especially when I start to sleep. It feels like pressure and I want to go to the bathroom. The baby is active. I'm 33 weeks pregnant, I'm afraid that they might start early...