Weight gain first trimester

Anyone else worried they are gaining too much weight.. I cant Stop eating or I get nauseous.. and then im so tired I dont get to exercise that often. I sit at a desk at work so no movement there. Only in my first trimester and already gained 15 pounds. They already did extra bloodwork due to my possible bmi. I can't find a good balance. I'm doing everything my body tells me to because im nervous from previous losses. Any advice is appreciated