How so I stay sick longer?

I have a sore throat & runny nose & lymph node infection (and like 5 canker sores) but it's all going away! I need to keep it, I don't want my body to fight it off yet. Don't ask me why, but let's just say I have a verrrrrry good reason that involves me ping the 8th grade or not. I can't "fake" it cuz my mom is really good at telling when I do that!! I'm afraid it's gonna be better when I wake up tomorrow!! What do I do?!