weight gain worry ?

Does anyone worry about how much weight they gain and how quickly? I know there's healthy weight and what they recommend, but what about going over it. This is my third baby. I gained 19 with my first and 55 with my second. I typically eat healthy and drink only mostly water. It doesn't seem to matter I'm only 21 weeks and I'm up about 24 pounds already. Does anyone else have this ? Baby is healthy just curious.