I have tinnitis like a constant high pitched cricket. I first noticed it right after the GBS-like onset of this illness. It seems to get worse when I am worse neurologically or tired (which correlate). It is also worse when I lie flat. It really does not bother me which is surprising because I have never been able to stay in a room with a buzzing fluorescent bulb. I hope your symptoms are better when the cold is better and you are off the additional medications and more rested. If it persists and does bother you, especially in the quiet of the night, try “white noise” like a fan to see if it helps.
WithHope

You can add one more to your unofficial count. I had already been dx’d with tinnitis pre-GBS, but it became much worse since. During my hospitalization I lost hearing altogether for about 2 weeks.