Waking up in horrible pain

Im 32.5 weeks. Many nights over the passed week or so, I get woken up by really bad pain. Like a menstrual cramp that covers everything up to my stomach. I try and move to my side or something to see if it relieves it but it doesn't. After a few minutes it'll go away but it's happening increasingly more. Has anyone else experienced this? I do get BH that are sort of painful because he's so low according to the dr. But it doesn't feel like that. Any ideas?

**Yeah, I drink a ton of water so I'm not dehydrated. Idk it's weird.