Going to quit caffeine at least for a while.
For over a month I have had noise in right ear. First just annoying, then loud enough to disturb sleep. My primary said many people have sinus problems due to bad air, suggested nose spray, rinses and benadryl. Didn't work, benadryl didn't help me sleep, just gave me nausea.
Went to specialist, she found small piece of wax stuck directly on eardrum and pulled it out. Didn't work, it's gotten louder and louder. Imagine an alarm clock perpetually ringing in your ear.
Five weeks without a night's sleep or a moment of peace and quiet. Ready to ask doctor to remove entire internal structure of ear, sacrifice hearing on that side for end to noise.
Long shot but seeing if giving up caffeine helps.
To sleep, perchance to dream (Shakespeare for all occasions)