Weight gain in 2nd trimester, even though overweight. advice 😊

Hi everyone, this was on my front page. I know that pregnant women have to eat a little more because their bodies are doing extra work. But what if you're already overweight? I'm not saying obese on the BMI scale, but overweight. (I know BMI is BS but this is important). Do I really have to eat more? Or just eat as I am and see if my midwife mentions having to gain weight? I haven't gained any weight. Just boob and tummy. I'm 13 weeks. (Glow says you're in tour 2nd trimester at 12, I know it's technically 13-14 weeks) thank you 😊