Food is not my friend

Amy Jo • 29, married to the love of my life, mommy to an amazing baby boy 8•11•15, now expecting #2 in April ❤️
Well my Dr. is a little upset with me because I have lost a total of 6 pounds. I do eat, I just can't eat big meals because I get full really fast. I love soups because they arnt so heavy on my stomach and I eat tons of fruit and veggies. Should I be worried that I'm not gaining? I'm 15.5 weeks along.