How long will I have the flu?! :(?

I've had it since Friday. And it was very sudden. I was fine at school then around 6 I felt horrible. Yesterday my mom got the doctor to get me some tamiflu. Ugh idk I just feel really bad and I'm not sure if I'm nauseous or what but Monday at around 4 in the morning I threw up bile 5 times. I get really hot and then cold but sweaty. It's just not fun when will it be over?