To everyone recommending vitamin c: there is no evidence that it does anything but making your pee slightly more expensive unless you have a deficit, which you don't, because you'd notice your teeth falling out.

Liquids, rest, ibuprofen and wasting around for a week is all we got. Pseudoephedrine medication if it's really bad and congested or you need to stand upright for three hours because something can not wait.

Get well soon.