Well, bless your heart!!
Would ice packs help? We have one of those gel-filled ice bags that you can reuse... muuuuuch nicer than the old fashioned kind or a ziplock baggie of ice. So, if you need ice, spring for the gel-filled pack.
Otherwise, I think staying in (out of the sun) and planning some rest is advised. Why not plan a movie marathon and get some dvd's and popcorn. Treat yourself to a couple of pajama days... you'll have earned them!
Friday is your appointment? We'll be thinking about you!