5'3, 130lbs

I got married Aug 2017 and weighed 112lbs. I was about 125ish before wedding diet. I'm now 130. I've always been fit and active. we are ttc and I've never been this big and I hope to be pregnant soon bc this will be my first and I'm 38. However I'm really scared to be bigger than my normal self then gain pregnancy weight on top of it. I read that if you are overweight you don't need to gain as much weight. can this be true for me too? or would I still need to gain 25 lbs? I'm planning on eating really healthy and nutritious foods and also going to the gym. I've already lived this way. also, when you do work out, do you need to add even more calories? thoughts? thanks!