Eh this is quite common lah, some of us maintain weight for a while and then suddenly shoot up later, doesn't mean something's wrong, tapi better check with your gynae just to be sure everything's on track with baby okay? In the meantime, a few mum friends swear by frequent small meals with calorie-dense stuff like peanut butter, avocado, full-fat yogurt, and dates rather than trying to force big meals, since our stomach's getting squished anyway. Make sure you're drinking enough water and resting well, because sometimes stress or not sleeping enough can affect weight gain too!