Lol..I hear ya with the worrying part but try not to!! Everything will be fine..
You were over weight before you got preggy? If so than your Dr. Should let you know or tell you how much weight he thinks is healthy for you to gain!! Please don't stress over this...Just eat the right foods (ex: fruits, veggies, and fibers.) nothing in excess is good for you ya know??
Try this...Everything that worries you and you find out is perfectly normal, write it down...So that next time around you'll know exactly what to expect!! Imma have to do that cuz I was in paranoia city until about a week ago!!