Ouch! In pain today and getting depressed.

Great you saw a doctor.

He didn't suggest you see an ENT?

What antibiotics are you on? (Just curious, some are ototoxic, and you can find a list here).

To be honest, as you've been checked out by a doctor, there's nothing else much that can be done.

You just need to try and be patient. Wait it out. Once the sinus infection clears and it's been a while, you can assess your situation again and see whether the tinnitus might be a permanent companion.

As of now there are no guarantees for one way or another. The worst case scenario is that the tinnitus stays and after some time you become habituated to it. The best case - the noise resolves on its own.

What you can actively do is to try not to listen to it. Make use of masking. Listen to music at sensible levels, or some other masking tracks you find pleasant. When your overall health permits, go outside & engage in activities.

I feel for you, and it truly sucks the options are sort of limited.
Stay strong.