Contractions only at night??

The last couple of nights, I start getting contractions almost as soon as I lay in bed. They start mild, like period cramps, and then turn more uncomfortable and travel to my lower back. It makes sleeping IMPOSSIBLE.

I even get up, eat breakfast early, and read. Eventually, I need a morning nap - they’re still going but no pattern and I’m able to breath through them. After my nap, which they continue through, they disappear.

I get my body is more relaxed at night. But it’s not like a running marathons during the day; I’m just chilling on the couch or in the bath reading.

This is my first pregnancy and I’m 39 weeks tomorrow. Is this normal??

I haven’t seen my mucus plug come out or loss of fluid (besides heavy discharge).

I get excited at night because I think it’s time but they never get truly bad and disappear with the sun. They’re like vampire contractions 😒