No it's not & u shouldn't worry unless ur Doc is concerned. Lots of women lose or dnt gain weight in the 1st trimester. Even a little after. I've been so sick from the beginning (5 week's) & lost 10lbs. Now I'm 14 week's. I still get sick bt it's not ALL day like it was before & I've gained 3lbs in the last week 1/2.
I'm 17 weeks. Just gain 2 pounds
I haven't yet either but I'm 170 n 17 weeks alongs