Dull cramping

Anyone have like burning cramps low in their belly without tightening? I’m 36 weeks and have been really crampy lately but today I’ve got these burning cramps that don’t seem to be going away. I’m laying down and drinking water and baby is moving some but low in my belly right above my hips are like dull period cramping. It’s not time able or tightening so it’s throwing me off. It’s making me nauseous.