All I could think about was the possibility of your being pregnant. Sounds like it may instead be related to dander though (as suggested by other posters).... Since they started hatching, I have been so sick with nausea and don't care if I ever see another chicken ... Every time I picture eggs in the bator, I get a huge wave of sickness. Even reading about chickens on BYC makes me nauseated ...
Years ago I made pottery. After getting pregnant, I found I could not stand to eat on plates I made - this association persisted for some time (finally went away).
Hope you are feeling better now!