Impossible to gain weight during pregnancy

Kennedy • I have a beautiful daughter, and my 2nd due in August ❣️

I am having the hardest time gaining any weight during this pregnancy! It’s my second baby and I’m 17 weeks and feel like I don’t even look pregnant. I’ve actually lost weight and can’t keep any weight on. Is anyone else having this problem and if so what are you doing to gain weight? My s.o thinks there is something wrong because I haven’t gained weight and I’m ready to start showing 🙁 please help 😊