If you are experiencing severe withdrawal symptoms, you should get medical attention. You can't wait out or sleep off DTs, you might die first.
Inpatient rehab would be useful to get you away from your substances. Tapering off benzos is nearly impossible to do by yourself, you need an advocate that really understands the process. I had nearly a month coming off of klonopin and alcohol that was the most hellish thing I've ever experienced. Being in a controlled environment with a doctor guiding me through a gradual taper would have made all the difference in the world.
I wish I'd had access to the treatments that you do. Take advantage of them.