Huge baby?? Vbac??

I went in for my consultation today for a vbac. This is my second pregnancy with my baby boy😍

At first she said I was cleared for a VBAC , but when she measured his body and noticed that his stomach was measuring at almost 38 weeks and he’s only 34 weeks as of yesterday.... I was shocked!!! She said at this point she’s not sure if having a vbac would be the best option for me so she wants me to go back in, in a couple of weeks to measure him again.. only thing is I’m worried I’m going to have a huge baby! Lol funny but literally scary!!!!!! Has anyone ever experienced this??? She said he’s weighing in at 6.11 right now 😱😱 and I’m terrified at this point