From my experience – not with pregabalin specifically – very small doses of cannabis can be quite effective is managing some of the withdrawal symptoms. A microdose of THC (for instance, a 2-5MG edible product) can help take the edge off of the anxiety/fidgety symptoms of withdrawals. With micro-dosing, ideally you want to find that middle place where you are getting relief from the withdrawal, without over-impairing your core functions. If you can find the right solution, cannabis may help you get through the timeline required for your body to pass through withdrawal period.
Larry