Oh boy - no step down? I would suggest that you call your doc and inform him or her of the symptoms you're having. They sound typical for withdrawal from Cymbalta. That can be a rough one to start and stop.
Withdrawal symptoms can include nausea, vomiting, dizziness, headaches, irritability, and even vivid nightmares. In general, withdrawal symptoms can begin up to a week after the medicine is stopped and last from a few days up to three weeks. If the medicine was stopped unintentionally, symptoms will improve once the medicine is started again.
Again, calling your prescribing physician might be a good idea.
Good luck to you and please let me know if you have any further questions!