27 weeks and can hardly stand up

Meli
Help... I'm 27 weeks pregnant and my uterus hurts so much it started2 days ago and won't go away. 3 days ago I thought I just ate something bad but I was nasueos and not feeling well all day the next day I had cramps now it's tender to touch. I have the pregnancy belt on now and that helps a little but still tender. Anyone else experience this? I think I should go to my doctor tommorow. Maybe I need bed rest?