I went to an ENT doctor who sent me to a specialist. They did a brain scan and ear testing and couldn't find anything.

I finally read on the internet that medications can have side effects and cause tinnitus. I realized my ringing started when I was working two jobs and probably used overdoses on both Melatonin and Tylenol PM in a desperate effort to get some sleep. I also wore earplugs, which may have exasperated the problem through added earpressure. I've never used Melatonin since. But, the damage was done. They've never got worse or better.

I read that the fine receptors in our ears can be damaged by some medications. 🙁