Don't know what to do

I want a baby but I have pcos so it's hard I know it will be in the future and the relationship I'm in now he says he wants a baby I'm just not sure if I got pregnant he would be ready we argue ALOT about the stupidest things and have been together for a while but I think the most time we've spent together alone just us no work no friends or family was maybe 2 days if that it seems we always have to have a buffer or some one to blame the arguing on we planned a vacation and it was suppose to be just us secluded where we could talk and spend time together I was gonna use it as a if we can't get along alone for these few days we probably won't be able to spend the rest of our lives together test type deal and we can't even agree on the place or anything so Idk if I want to have children with him or not but I'm afraid if I don't keep trying I might lose my window to get pregnant and I love him I really do but I think he's in love with the idea of what he could have with me instead of me Idk what to do