Withdrawal: the feeling of being completely and utterly miserable because you took that one thing for granted.
Caused by: Caffeine Withdrawal, Detox Withdrawal, Nicotine Withdrawal, and Romantic Withdrawal
Symptoms:
For the love of all that is good and holy, Medication is your friend.
Don't be a hero, pace yourself, and for the love of all that is good and holy, avoid it if you can.