Measuring larger than fundal height

My baby has been measuring 2 to 3 weeks ahead of schedule, and ahead of my fundal height, for the past 8 weeks. Has anyone else experienced this? Example, I'm now measuring 34 weeks by fundal height. Baby is measuring 37. This isn't a one off. I've been having monthly growth scans since my 20 week because of his increased size (determined to be genetic).

Has anyone else ever had this happen? I am SO uncomfortable. I have a bicornuate uterus so it's already cramped quarters as is.

Just curious what anyone else's OB is saying or if you delivered early/there were any concerns.