Your most likely reinfecting yourself...Once you get it on your skin, and wash it all off it cannot spread it on yourself, or to anyone else. The ooz that comes out of your skin isn't the poison, its just your bodys reaction to it. Make sure to wash everything you were wearing that day, including your bed sheets that you slept in that night...and any tools you used. The oils from ivy can stay on clothing, shoes, and tools for over a 2 years...so if you don't wash that stuff you'll be reinfecting yourself for the next 2 years.
Besides what you've already done I am not sure of anything to quicken the process...the shots and steriods always do the trick for me...
If you EVER EVER EVER think you have come into contact with it, get in the shower and cover your body from head to toe in dish washing detergant (Palm Olive...etc.) These soaps are designed to surround oils and remove them from the dishes (in this case your skin) were as regular soaps (dial/dove) are designed to keep moisture and natural oils in your skin....thus they're just holding the oils in your skin...
Hope you get well soon...I remember one time I had a perfect hand print of rash on my face from Posion....it was pretty rough, it was on my eyes, nose and ears....then eventually down my neck....so I feel your pain!
Bryan