Cat knows...

BabyMama
Ever since I found out I was pregnant our cat has been really mean to me and everyone else in the household, meaning our two dogs and my husband. He's scratched me twice now. He attacks the dogs (one is hairless and his poor skin is all scratched up) on a daily basis. I can't even look at him, let alone pet him, without him trying to bite me. 
Has anyone else experienced this? How do I get it to stop?