Perhaps try masking the T
@MilaS, because if your brain feels that there is some way to eliminate T, it will not be as anxious. Anxiety and stress can make T sound louder. So try to something to reduce your stress level. Try some relaxing walks, jogs, hikings, or some other hobbies to distract from T. For masking, these are some suggestions:
TT's own excellent masking sounds:
https://www.tinnitustalk.com/audioplayer/
If you need more masking sounds, here is free 'aire freshener':
http://www.peterhirschberg.com/mysoftware.html
Rain sounds are soothing indeed. You can mix your own rain sounds with this rain generator:
http://mynoise.net/NoiseMachines/rainNoiseGenerator.php
Search youtube with 'masking sounds' and you will also get lots of different nature sounds, such as rain, waves, waterfalls, running brooks, insect sounds, even shower & faucet etc.
For calming your anxiety, your may want to try some natural supplements, such as chamomile tea, hops, valerian tablets, St. John Wort. If you have trouble sleeping, melatonin may help.