more kids

Putting this out there because maybe someone will understand. My husband wants another child but I don't. We have 3. I  am horrible pregnant. I get sick I gain water weight so quickly and I've finally gotten down to pre pregnancy weight a year and a half later. I know I should feel blessed beyond measure to be so fertile but I'm done having gestational diabetes and not feeling good about myself. Anyone else feel like they are done but their so is not?