I am anti e positive what is the out come for my baby and what can be done for my baby to be born healthy?

I got this from my last birth of my son.. he was really sick had hydrops fluid around his lungs and stomach and was supposed to be a still born but is now 5 years old n healthy.. im worried that i cant handle another big issue like this and i am in need of one more child abd am 11 weeks along.. im so concerned and scared..