I experienced this same thing. About 5 months ago. Got too stoned one night. Freaked out. Ringing in ears. Thought I was going crazy. Woke up the next day just fine. Was fine for a month or 2. And then boom. One night it all hit me again. But this time I wasn't high. Now I have ringing in ears and panic / anxiety. It's been with me for the last 5 months now. Just want to feel better. Did it ever get better for you?