22 weeks pregnant normal BMI what has been your weight gain?

Nikki
I'm starting to wonder why I have only gained about 3.5/4 pounds since prepregnacy. I'm 5'2" Started out at 122 now I'm between 125/126, I never had bad morning sickness so I don't understand why I am not gaining. I feel I eat enough approx 1850 calories a day. I don't want to go overboard and blow up lol! I'm sure it's coming so kinda of makes me nervous. When did you all gain most of your pregnancy pounds?