Insommnia and tinnitus

I have had tinnitus from a car accident 12 years ago. Use white noise and good sleep hygiene. For years took meds, but increasing side effects from a different health concern brought a halt to that a year ago. No solid sleep since then. Several docs among other people have suggested melatonin, with no clear advice about dosage and often saying “short term”. Tinnitus isn’t short term and my need for sleep isn’t either, esp as it’s affecting different areas of my health.

Any experience or help would be deeply appreciated,

Kay