Plus size. Anyone in the same boat?

Im plus size, im actually considered morbidly obese. (There is no nice or pretty way around it :/) Anyways, I have pcos and after six years of ttc. My husband and I finally conceived our daughter, she is now 9 months. We are both ready for another and we want a big family. Though when I was pregnant I had gestational diabetes and after giving birth had preeclampsia. I guess my dilemma is and even knowing I need to look at the bigger (and healthier) picture... If trying for another baby is the right thing for us right now. They say after having a baby you can be very fertile and I just don't want to lose my chance of conceiving. Is anyone else in the same predicament as me? And please no nasty comments. Thanks.