High fetal heart rate??

Victoria

Went to my 36 week appointment today, and babies heart rate was in the 180’s and wouldn’t come down so they hooked me up to the monitors for about 20 mins and it finally come down in the 150’s. It stayed there for a good 10 mins so they said I was good to go. He was all over the place during this and said he might have been mad from the doctor feeling to make sure he was head down. Lol. Plus I ate right before. Has anyone had such a high heart rate? Really scared me there for awhile. Plus he’s measuring at 40 weeks so they scheduled an ultrasound tomorrow to check on his size. FTM and got the worries!