Hubby upset about future kids

So I was talking with my cousin on the phone last night and my husband overheard me say this baby was probably my one and done. He got very upset and his face broke my heart. We really haven’t talked about any future kids yet. I had assumed with all the issues we’ve dealt with through this pregnancy, that he’d not want to go through it all again. I’m over 35, been hospitalized for severe dehydration multiple times, and am now dealing with some major pancreatic problems that we can’t really treat until after baby is here. He’s had to pick up my slack everywhere because of how ill I’ve been. I don’t want to do this again to him. I just feel terrible all the way around.