No weight gain?

Megan • Mother of son-6, step parent son-7, married 05-15-15, been together 5 years. Expecting rainbow baby 06-11-16
I am 11 weeks pregnant. But I haven't gained any weight I have morning sickness but it's usually when I don't have something on my stomach or when I first wake up and don't eat fast enough. I'm not really craving anything but pickles do anything else I try to eat doesn't sit well, any tips?