Oh ick!! Try picking up some Mucinex. If it's a sinus infection, you're going to need an antibiotic because they just don't seem to disappear without them. Blechy for you. And you're going away this weekend?? Do you have an emergi center near you? Maybe you could go there instead and get a ZPack or something.

Hope you're feeling better soon. I despise sinus infections. I get one about once a year and they always make me feel like death warmed over.