How To Deal With Sore Throat And Cold?

I started out having a sore throat and being sick to my stomach on wednesday feb 8th. Because of this my friends suggested getting tested for strep. But I never had a fever and the next day I started having a runny nose and congestion, which my mom says you don't get with strep. So I never saw a doctor. Then on sunday I started having a pretty bad cough which carried into monday (Feb 13th). I have a lot of sinus pressure and headaches. Now I was woken up with the feeling that I'm gagging. It feels like fluid is building up in the back of my throat and I'm going to drown on it. I didn't see anything when I looked in the mirror though. It did however look like my uvula was touching my tongue. I don't think it usually does that