Can’t sleep on my left side


I was told at my 32 weeks scan that baby is growing very slowly so I chose to stop working....and then baby picked up the growth... I am sleeping on my left side since then. I have put on lots of weight. My left side hurts so badly in the middle of night. I will be 39 weeks tomorrow. I wake up due to peeing a lot and due to pain on left side...anyone else experiencing this?????