Hi ladies, I'm overweight too (was 14st when I fell pregnant, although had lost 2 stone prior to this) and now up to 16st again - I was told by a consultant not to gain any weight(!!!) during this pregnancy (my first) which is quite frankly ridiculous - the first 16 weeks I could only stomach bread and had lots of food aversions. Don't feel bad if you cant stomach salads, I certainly couldn't. Eat what your body needs. I've always had a large stomach, but am pleased to say I've rounded out quite nicely at 33 weeks and I'm sure you will too! The only issue is the loose skin at the bottom of my bump, but there's so many nice maternity clothes that hiding it isn't hard and can disguise it pretty well! Especially bump bands and tight vests with harem pants.
In terms of scans, I have a lot of tummy fat but this never hampered the images I got, and nobody ever commented on it either while I was being scanned.
Nobody has ever made any negative comments about my weight during the pregnancy at all really - I was obviously explained the risks at the very beginning when they took height and weight etc but this wasn't done to make me feel bad, just to make me aware that I was slightly at risk of more things and nothing has been said since, I've not even been weighed. Most bigger ladies have perfectly risk free pregnancies. My mum has been tiny all her life and every single one of her pregnancies had severe complications.
The only issue I'm having is possible pre-eclampsia due to family history, and polyhydramnios (excess amniotic fluid) although no cause of it. Im clear of gestational diabetes too.
You will be offered extra growth scans later on due to BMI (which to me is no bad thing!) plus the glucose test, and that's pretty much it. You may be advised to take extra folic acid until 12 weeks but my midwife didn't bother.
Congratulations and hope you have a lovely stress free pregnancy!