You are now dependant on anticholingergenics, like DPH, to get to bed, and DPH has half the half-life of the longer acting, smoother, less-side-effect ridden Doxylamine Succinate. You can buy it for very cheaply and it makes you extremely exhausted, much moreso than DPH, but also doesn't give you that bad of a hangover, which is strange because its half-life is considerably longer.
I would at least use Doxylamine as a tapering tool off of 2-4 times the recommended dosage for DPH for over a whole year. You won't have mental w/d's, but you won't be able to sleep for a few days. Doxylamine is the sedating ingredient in NyQuil, which is why some people drink NyQuil, they are ingesting doxylamine in that syrup, at 6.25mg per 5mg tsp.
At least pick up some chelated magnesium and melatonin, and try exercising and a healthy diet.