Weight loss while pregnant

Its been 2 weeks since the last weight In, I have decided to check how much I gained/lost. I have a difference of 11pounds in 2weeks this does not sound normal... but I feel the baby and I feel ok and everything seems fine... I've always had hormone issues and consequently more o less weight all my life I've been a yoyo going from 170 pounds to 230 something. Since the age of 17.... depending of a lot of factors. When I was told I could never have babies I was gaining weight at a abnormal rate and that's why I went to the doctor. The first 7 weeks of pregnancy I was taking hormones because by blood work as it showed i had that same issue I always had...and honestly since then I haven really gained more weight during the hole pregnancy, but now I lost out of nowhere as im not on medication since the 8week I lost these 11pounds and it sounds like to much cause the baby should be growing and I'm at 29 weeks. Any one lost weight like this while pregnant?