Welcome
@eclipse to the forum. It is positive that you have real low T days. Try to count that as a positive. The more positive, the less stressful you are and the less intrusive T can become. It is not a straight equation, of course. But it generally helps to stay calm to prevent stress and anxiety from building up to aggravate T. One way is to mask it. You said nothing drowns it out. That is tough of course. Many of us have those days. But I think any masking will help distract the brain and the audible system to focus on T. In fact TRT states that the masker should be set at a level lower than the T sound just to let the brain get used to or habituate to the T ringing. I have ultra high pitch dog whistle T. So I have to use really high pitch masking sounds, shower, waterfall, torrential rain, even squeaky faucet sound and even that sometimes would not cover my T. I could hear it above the jet noise in my recent flights and above the raging rapids in the wild salmon rivers I fish. So I know your pain dealing with obviously loud and high pitch T. If you haven't tried these masking suggestions, give them some thoughts. Take care. God bless.
1) Mask at bed time so you can sleep better. Find whatever sounds/music that are soothing to you. You can use a sound machine or sound pillow for this, or a computer with speakers.
2) If you need masking on the go, try load an ipod with nature sounds or music using itune. If you have a smart phone, you can download free APPs for soothing or T-masking sounds.
3) If you have computer and speakers, you can try these excellent masking sounds too:
TT's audio player:
https://www.tinnitustalk.com/audioplayer/
or this online sound library, particularly the self-mix nature sounds:
http://mynoise.net/
or download free sound generator 'aire freshener':
http://www.peterhirschberg.com/mysoftware.html
or search youtube with words like 'tinnitus masking sounds', 'white noise', 'rain sound' etc.