Need help

I am currently 14 weeks and 3 days pregnant. Right when I first fell pregnant I weighed 132 pounds. Yesterday at my appointment I weighed 121 pounds. So far I’ve lost 11 pounds while being pregnant. I did have morning sickness (which I hope is over). My legs and arms are what’s getting skinnier. My stomach is bigger and there’s a bump. I am eating. What can I do to put on weight? My step thinks I’m trying to lose weight and that I’m anorexia but I want to gain weight!!