I have the same neck and tinnitus issues. 62 years ago I was in an automobile accident, pre-seatbelt days, and as a front seat passenger my head hit and cracked the windshield. 3 discs in my neck were tilted 3, 4 and 5.
I was told by age 50 I would be getting traumatic arthritis which would include headaches. By 50 I had a neck that didn't have full rotation, but no headache or other symptoms, but by age 73 changes were noticed. Big negative for me is I kept hearing water running. Lying in bed at night I'd get up and roam around the house trying to figure out the source. Finally figured out it wasn't a water leak, the sound was coming from my left ear and the running water noise would skip with the beat of my pulse. I'd heard my pulse in my left ear for years especially if my blood pressure was high.
Had a MRI to check out my brain for blood clots, all clear. But before reading your post I never found any collaboration from other bloggers about tilted neck discs being the cause of my tinnitus. My neck must be supported in a perfect position when I lay down and thank goodness for back up cameras on cars these days. Rarely do I need an NAISD like Aleve for the pain, I don't get headaches just neck pain. This is progressive and hope the arthritis doesn't deteriorate to the point I need a fusion, which no doctor has mentioned. Thanks for sharing.