What to do.. need advice...

So my husband and I have 2 cats a dog and a 4year Old. One of the cats we have his our sons the dog is all of ours and the other cat is mine. I know the dangers of scooping litter while pregnant and all that.. but I’m having a hard time getting along with my husband about the cats and dog while I’m pregnant because of the smell of the litter box and me changing it and the dog shedding. I’m just stuck and don’t know what I should do. I’m tired of it always being a fight anytime we talk about the cats or dog. My son loves his cat so much and would be devastated if we were to get rid of her. So what should I do?