Fred, I hate to say it but ursula is doing a more appropriate taper and you should be doing the same. What you need to understand is that your nervous system adapted to the presence of D by making oppositional compensations. When the drug is reduced too quickly or cold turkey, these compensations cause rebound symptoms which appear to be like the condition you took the drug for to begin with. So, rebound insomnia when it was taken to help you sleep.
By tapering on a schedule you propose, you run the risk of suffering from withdrawal symptoms which can incude anxiety and even suicidal ideation, to name just a couple - there are many more.
A very slow taper must be done to allow the nervous system to make the adjustments back in reverse without setting off rebound symptoms. The idea is to make the cuts small enough as to not feel those symptoms to any degree. It sounds like those who have replied here have cut at a level that has caused symptoms, anxiety, and then they take a little bit more. The problem with that is, it confuses the nervous system - should I be adapted to less, or more? Dosing must be consistent, and every effort to handle resulting anxiety in non-drug ways. If the symptoms are that severe that one is desperate to take something to help it, then the taper is being done too fast and/or cuts are too big.
Your taper plan is too aggressive. You have sensitized your nervous system with your cold turkey and so it will likely be necessary to undertake a very slow taper. One must never do the next cut when experiencing symptoms; that is a sign that the nervous system is already reeling, and adding another cut on top of that is asking for disaster.
I'm sorry you are finding yourself in this position. No one ever seems to be warned that this could be the outcome of using something to help you sleep.
I know you feel very helpless right now, and the main thing is for to be safe, not harm yourself. You will get through this and be able to go on living your life, it's just going to take some time and effort. So please, if you are feeling at risk, please seek family, friends, a support hotline, even the local emergency, because this feeling will pass - this is temporary.
Please don't be so hard on yourself. You need to be gentle with yourself. You are not to blame for this happening; you didn't know the risks and did not sign on for this. Try to take deep breaths and calm yourself; the negative ruminating will only keep you in stress, and that will keep the suffering going.
I'm going to send you a link for something I think can help.