Third trimester cramps??

Today I’ve been having period-like cramping for about an hour or two. I haven’t timed anything because they’re not too particularly painful, and they’ve actually been pretty constant, rather than coming and going. They’re slightly painful, definitely uncomfortable, but not the end of the world. Just feels like a period. They are low, where my uterus would normally be. What is this?? I’m 30 weeks 3 days, good fetal movement today. No sex recently, no bleeding or anything else. Just cramps.

I’ve heard that Braxton Hicks feel like tightening, this just feels like pain. And it’s low. Idk.