I don't believe a detox center will be of much help -- they help addicts, and usually do cold turkey. If you can find one that doesn't, okay, but that will take time. But you can find a psychiatrist right away to put you back on Xanax and taper you off as you should have done. While you can get seizures quitting a benzo abruptly, especially after being on it for so long, since it's been a week that isn't likely to happen now, but the withdrawal you're going through might go away in a week and might last forever, so I'd play it safe and go back on the Xanax and do it the right way. Because you've been on it for ten years it could take months to properly wean off it -- I'm surprised they tapered you off Lexapro but cut you off of Xanax, a much more dangerous drug. I wouldn't bother with your PCP, and why someone in the healthcare industry would ever listen to a nurse about drugs for the brain is a mystery to me, but psychiatrists specialize in this and that's where you need to go, though since it might take time to find one, I'd call your PCP right away and see if you can't get a script for the Xanax. I don't know as much about what to do about the Lunesta, except to say that taking sleep medication for a long time usually gives you worse insomnia, not better, but I'm not as familiar with the withdrawal problems with it. Going on neurontin might help, but if your goal is to stop playing with GABA by getting off the Xanax, the neurontin will present the same problems over time -- it's shooting pure GABA into your brain. Probably easier to quit than Xanax, but possibly protracting your withdrawal in the following way: withdrawal is caused by the brain trying to go back to working without drugs, as they alter the natural way the body processes these neurotransmitters. Sometimes the brain can do this, sometimes not. Sometimes prolonged use of benzos interferes permanently with the ability of the brain to adapt to stress, sometimes temporarily, sometimes not at all depending on the person. Taking antidepressants for a long time can permanently prevent the brain from ever working naturally again, or do it temporarily, or not at all, depending on the person. Meaning, you could be suffering withdrawal from all 3 meds in one form or another and so expect a transition period no matter what, but the Xanax needs to be handled as carefully if not more so as the Lexapro. Be safe, find someone quickly to do this safely. Once you're better, then you can think about suing, because the prior answer is correct, you've had a very common case of malpractice committed against you. Patience.
It is very dangerous to cold turkey of Benzos. I would say you might better better in 4 weeks however I feel the doctor can not due that and you should seek legal advice. She needs to wean you off this medication, your body has become dependent on it. You need to speak with that doctor and ask for a tapering schedule. Or I would report her for malpractice. You can die from the withdraw! You need to get yourself into a detox center and explain what happened.
I would demand more medication to wean off of. You should never cold turkey off so many medications!