38 weeks and doctor want ultrasound again

I'll be 38 weeks sat and doctor was me to get an ultrasound tomorrow to check baby size again. We did this at 31 weeks. Doctor says I am measuring bigger and baby was estimated bigger at 31 weeks.

She said that we won't really induce but just to get better idea unless I have lot of extra fluid still then we would induce...

Finding it really weird

She didn't check me at all to see if dilated or anythinf. Been having cramps and believe some of mucus plug has come out. Hmmm mm