I have empathy for your frustration. Most of us have been where you are and understand the feeling of frustration and hopelessness, especially when T is relatively new. Four months are still a short time for T habituation. Have you tried any masking? If you haven't here are some suggestions:
TT's audio player:
https://www.tinnitustalk.com/audioplayer/
or download free sound generator 'aire freshener':
http://www.peterhirschberg.com/mysoftware.html
or make your own rain sound:
http://mynoise.net/NoiseMachines/rainNoiseGenerator.php
or search youtube with words like 'tinnitus masking sounds', 'white noise', 'rain sound' etc.
Try to be patient & give it time. Read up as many success stories as possible and try to learn how others get better. A few years back I was in your same shoe and worse, as I also had severe H besides ultra high pitch T. But today I live a normal and absolutely enjoyable life. If my success story helps you, here is the link to it. So don't lose heart. You will get better. Believe it. Take care. God bless.
https://www.tinnitustalk.com/threads/from-darkness-to-light-how-i-recovered-from-tinnitus-hyperacusis.3148/