25 weeks and LOSING WEIGHT😭

I need advice. At 20 weeks i was told I’m behind in weight gain and need to be gaining a pound a week. I’ve been trying so hard and last month only managed to gain 2 pounds for a total of 10 pounds weight gain.

Now, I’ve started losing weight!! I feel plenty full and when I do eat I try to make it things that are protein packed but I can’t seem to keep the weight on. Help!

My SIL is also pregnant, 3 weeks behind me, and she is somehow able to eat CONSTANTLY! Ive tried snacking throughout the whole day, per my OBs suggestion but even that I can’t keep up with.

Any advice?!