cramping at night

Kl
Hello!
FTM a little over 27weeks. I had a really active day yesterday with work that ended around ten. I was so tired, but couldn't fall asleep until 1:30 because my stomach kept getting tight. It wasn't painful, but uncomfortable. Have two more days of this and trying to be a little more conscious to sit down more during the day, but it's hard. As long as it went away, I shouldn't be worried...right? Has anyone else had this?