My body is too small for pregnancy 😖

I’m 5 foot and hubby is 6”2 and we’re expecting our first. I’m 37 weeks this week.

My pre pregnancy weight was 108lb and I’ve only put on 28lb so far. However, I have a tiny frame and this baby is measuring huge on the fundal height scale. If it was in percentile, it would be between 150-200%! My pelvis feels like it’s breaking and my ribs are sore. There is no room for this baby to go unless she literally breaks my bones!

I haven’t had any additional scans since 20wk - in the U.K. they don’t unless there’s a ‘real’ issue or the baby is unhappy.

Anyone have any stories of surviving a birth with a giant baby? Or also has significant size differences between you and your baby’s father?