Belly feels smaller?

I woke up today at 37w 6d and my belly feels smaller today, anyone else experience this? I have a REALLY hard time lifting my right leg to put on underwear because that side feels more full, but today I can lift my right leg no problem! Also, I’ve been able to feel baby’s hip or knee or something a few inches above my navel and it’s in the exact same spot it’s been in all month, so I wouldn’t think he’s dropped at all. Any ideas why my belly is suddenly feeling smaller?