Not feeling well

I am currently 36weeks pregnant today I woke up with lower back pain the pain feels like on the lower back and waist area don’t feel anything in the front tho and it feels like I need to use the bathroom for #2 (tmi sorry). When I use the room I either get nothing or some stools. I get on and off what it seems to be tummy aches. And I also feel nauseous Is this normal? Could it be just constipation? I also get random tingles on both my legs when I get the back pain