Interesting that the audiologist suggested white noise. I would have thought that was more important for tinnitus caused by acoustic trauma. Did the audiologist mention anything significant regarding the fact that your cause was medication?
I am assuming you took Mirt for sleep or a bit of anxiety? Any reason for coming off? Staying on these meds can be physiologically tough for many people. Me being one. I remember feeling better but at the same time being bothered for being on the meds.