My daughter is almost 19 months old, and has always had a big stomach. Her weight is fine, but she's beginning to look very swollen in her tummy. I measured it today and it is 22 inches around - and her 12-24 month clothes are huge everywhere else, but don't even fit her stomach!! Is this normal? My health visitor didn't seem bothered about it, but I'm wondering whether I should just get it checked, just in case?