Too much weight gain

Is it ok to try and loose a few lbs by strictly just eating healthier? I over eat, and I know it. Is it ok to eliminate the junk and basically go to protien, veggies, grains even if it results in weight loss? Will this harm baby? I see a health educator in 2 weeks and will ask her as well, just curious if anyone else has done this to stay at a healthy weight while pregnant, thanks!