Gaining weight :(

I've been gaining a little weight recently and I hate the way I'm looking, my fat goes straight to my stomach. I'm a small girl so a few extra pounds is extremely noticable. But I eat normally! I go to the gym. I had a nightmare last night that I gained 40 pounds 😭. Idk what to do. I have tried to eat a little less but my stomach will act like it's starving. What should I do? Drink more water? Let my body feel like it's starving?