Quickest way to get over sickness

Kat
so I've been sick for 3 days now. My family claims its allergies but it feels more like strep but with symptoms of the flue. It's a crap ton of congestion, runny nose and coffing, headaches and pressure. I work in the foods buisness and go back go work in 2 days. What's the quickest way to get over this. Foods? Medicines?