feeling nauseous

morning time my feeling was good when I wake up I go buy food I eat lunch with my darling husband and I we  talk  and after we  text nap for 40 minutes after I wake up read a book,dessert now I feeling super-tired or nauseous ''lf l put my head in my hands and stare down at my desk, it''ll look like l'm working really hard and nobody will know l'm actually sleeping.'' big headache:-(