Tinnitus sucks! I've had it so bad that I couldn't sleep. The longest stretch was about a week. I can definitely see how it would drive someone absolutely, stark raving crazy. It was so loud, I couldn't hear anything else. A doctor did some experimental massage treatment that worked thank goodness. I still have Tinnitus, but it sounds like light static in the background, instead of a solid, loud hihh pitched tone.
I wear double hearing protection for everything now, just trying to save the little bit I've got left.