Tone switches ear?

The last few weeks I've managed to ignore my tinnitus somewhat and have done a good job of keeping my mind occupied with other things. The tones seem to be changing though. I'm not sure whether this is a good thing. The shifting pitch I've had in my right ear since my ear infection 3 months ago seems to be more of a constant tone and sometimes it becomes really quiet, unfortunately never for long.

However, for a few weeks now I've noticed a high-pitched hissing in my left ear that fades in and out. It was annoying but I tried to ignore it. Yesterday I started noticing I had the exact same sound in my right ear. Then it went back to my left ear and today it's my right ear again. Is this common? I dont' know why but for some reason it ramps up my anxiety again.