If it were me, I'd proceed. I don't think eating is particularly healing in a flu situation anyhow... treat yourself as you would during any detox crisis, which is the same as you'd treat yourself with the flu! Stay in, stay warm, stay down, drink LOTS of extra fluids (I would be drinking hot herb teas along with the lemonade and lots of water), take hot baths... generally treat yourself extra special.
And of course do the colon cleansing ritual, which will also help flush those flu bugs! Don't miss my New Improved salt water flush!!! Makes it virtually painless!
Dissolve 2 tsp. UNIODIZED Sea Salt in 1 c. drinkably hot water
Have the remaining 3 c. plain water standing by.
Chug as much salt water as you can, chase with plain. Chug and chase till ALL water has been consumed.