Braxton hicks??

I'll feel my belly get hard and tight for about 45secs-1min and then it starts to go away. As it's going away is when I get menstrual type cramping for a little while, and then that goes away too until the next contraction? Are anybody else's like this? I'm not sure why that would be 🤔 I would have thought I'd feel pain first or the whole way through, not after its already gone...?