I feel like i'm slowly dying i'm that tired...18 hours sleep?

yesterday i started my new job as housekeeping for a local hotel. for the past week i've been so knackered all day long that I just feel like dying, honestly, my legs are numb my eyes are sore and I get massive headrushes everytime I move. My clothes feel uncomfortable and when I move I can feel the contents of my stomach swishing around? My appetite's gone down as well, yesterday I ate 2 pieces of toast and some fruit because my Mum woke me up to feed me, otherwise I would of slept through. I did my job from 9-1.30 when I started just constantly crying I felt that bad, I went and told my boss and she sent me home, I was streaming tears and wanting to be sick. I was washing up before I left and the lemon smell of the washingup liquid made me want to hurl, my sense of smell was making me want to puke. I've constantly got a headache. I slept from 3pm when I got home until 9am this morning when my mum woke me up(i would of carried on sleeping)and I've had to take the day of work because I can't literally move...whats wrong with me:/