I'm sick any advice

Christy
Okay so here are my symptoms
I have a sour throat and keep coughing it feels like something is stuck in it but when ever I cough I feel like I'm gonna throw up. 
I have a bad headache and can't focus 
My nose is running and j can't breath from my nose 
Have a fever
My eyes keep watering 
And my stomach hurts 
Ugg I hate being sick and I've never felt so bad and I don't know what to do. I don't want to miss school and my parents won't let me go to the doctors what should I do any advice on what you do when your sick?