Extremely tired

I don't know whats wrong with me but I don't feel like doing anything just wanna be in my bed I don't feel like doing my make up or my hair I take a shower because I have to but besides that I feel so week not in the mood for anything could this be depression I'm 8 weeks pregnant or is it part of pregnancy I feel so tired even tough I took off from work since wed I have to go back on monday still feel so dam tired I feel so fat too because I'm always hungry :(