I am 36 weeks and yesterday my midwife mentioned that my belly has suddenly "jumped" from 35 to 39cm. I also had an ultrasound to see if the baby is head down (which he/she is, thankfully) and the baby's head circumference was also measuring at week 39. I know that weight predictions can be wildly off, but my midwife estimates that baby's current weight is around 8lbs.
Ordinarily this wouldn't bother me - my daughter was 9lbs 9oz and was born vaginally without too much trouble (although I was ripped to shreds.) But I read another post about someone measuring significantly ahead and a few people enquired about the possibility of polyhydramnios. Which I then googled, and am now panicking about. Particularly as I have had a number of losses so my general anxiety level is high anyway.
Would excess amniotic fluid have shown up on the (admittedly quick) ultrasound? Would you be concerned? Part of me thinks that if the ultrasound also suggests a 39-weeker, it may just be a big baby. Would there be more cause for concern if my belly measured large but the ultrasound showed an average-size baby?