If you bid to avoid any conflict with a trip your vacation hours will be left in your vac bank and it will not be deducted. Then when you go sick the full amount will be deducted from your sick bank.
Good luck, get well soon!

Thanks for all of the advice.
Herniated disc is no fun....

Wearing a cast for 30 days would do the trick or taking a medicine that disqualifies suspends you medical certificate or....having a thick neck