Was anyone else under weight pre pregnancy

I was pretty much under weight 114-115 (maybe even less because water weight) I’m 5’6 and my stomach literally sucked in unless I had a big mean or soda and I feel like I’m showing super early in this pregnancy my first baby, I’m only 14 weeks and I already have a belly and it’s not all bloat On the bright side they can see the baby super well the specialist even though I was measuring big but then later on said it’s just because me being thin anyway when did you start to show