HERE WE GO!!

So my husband and I have been TTC the last 7 months. It's been driving me crazy! Every month I take a test and end up crying in my bathroom bc I don't want to show my hubby how devastated I am. He always tells me it's in God's hands and not to stress about it. I have extremely heavy periods and around Ovualtion time I get painful sharp pains in my lower left abdominals for about 3 days. So painful that it hurts to stand up straight, lay down or just plain move. Well I started to think I was unhealthy and not able to have anymore kiddos, I have 3 already but I was under 30 when I conceived them. I am overweight, my husband tells me I'm just a little extra fluffy not overweight, and had a goal to lose weight before actually getting pregnant. I am about 40lbs over my college basketball playing days. My knees hurt and crack all the time which is why I convinced myself I need to lose weight before pregnancy bc I don't want to blow up. WELLLLLLLL, I just took a test yesterday and I'm PREGNANT!!! I'm sooooooooo thrilled and excited but today I'm stressing out! My boobs are huge already!! Im nervous about how big theyre gonna get LOL!! My past pregnancy i didnt gain much, around 20lbs but thats when I was in my 20s, Im 36 now. Do I still have time to make this a healthy pregnancy for my body?? Ladies any advice is welcome=0).