No weight gain and Small Bump 😢

Hello Pregnant Mom To Be, I’m am 17 weeks and 3 days pregnant. 2 days ago I went to the OBGYN appointment and they heard the baby heartbeat near 147 or 145. But only one problem they say I’m not gaining the weight and I told her that I’m am pre diabetes and I stop taking the metformin 500 mg after I find out that I am pregnant. She told me I need to eat more but I do eat a lot and she say I will be fine as long as I keep eating healthy food for the baby, the next time I see my doctor is June 10 of the gender of our baby and June 11 to see the doctor. I do know what to do. She told me that I don’t have to take the meds and my husband told me don’t gain too much weight beacuse it will be hard to lose the weight when I hit 30 in December. Sometimes I feel like crying. I’m not starving my child my love this beautiful baby since I first heard his or her heartbeat. It gives me happiness in my soul.

I need some advice