Hi there. Three weeks ago I moved in with some flat mates. They aren't particularly clean or tidy and they are living a cheap student life style. I've cleaned the flat and I do my best to cook as much as possible, but since moving in my childhood excema has broken out for the first time in nearly 5 years, all of a sudden I'm getting teenage acne all over again, my temperature has been moving quickly between chills and fever, my stomach is always unsettled, every time I eat I feel sick, I've been a touch constipated, my joints are aching, I'm lethargic, and I've recently been short of breath and sneezing constantly. Am I simply run down, or is it possible I'm having an allergic reaction?(as I said, they are particularly unclean and filthy, and if I hadn't mentioned they have three hamsters and a gerbil.)