Hello,
According to what I have understood you are talking about the withdrawal effects of Ambien. Withdrawal symptoms (such as nausea, vomiting, flushing, stomach cramps, nervousness, shakiness) may occur if you suddenly stop using this medication. To prevent withdrawal reactions, your doctor may reduce your dose gradually. Talk to your doctor and get it checked.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
My wife and another female relative have taken Ambien (generic) for years, and it still seems to work/help. I do not know what the W/D part of your subject is about.