How to get rid of poison ivy REEAALLLLLLYYY FAST?

ok so im allergic to poison ivy and i went out biking yesterday. didnt touch any plants and came back home feeling fine. but i woke up this morning and the entire left side of my face is puffy, turning red and itches! i know its poison ivy because ive had it like this before, but it took almost 5 days to go away! when i realized what it was it was already oozing, but that was last year and this morning it was only starting to puff up and turn red. the bummer: i have summer party tonight at 4 and a graduation party tomorrow! HEEEELLLPPPPPP MMEEEEEEEEEEEEEEEEEE!!!!!!!!!!