Someone please help

I’m 36w6d I feel like I have to have a bowel movement but I can’t go. I’ve tried all morning. I’ve drank a lot of apple juice. I’ve taken a stool softener. I swear it feels like I need to go. But when I get in the bathroom nothing. I sit so long my legs go numb. I don’t know what else to do. My stomach hurts. Itsnot unbearable just cramoy and uncomfortable