I had tinnitus prior to my accident, and I can tell you that simply focusing on it amplifies its effect. You should try to ignore it and use strategies to minimize its effect.

Leave fans on in quiet rooms. Sleep with a noise generator. When you hear it whirring away, try to listen to some music to distract your brain from the noise. For me, it wasn't anything more than the fact that I was paying more attention to it. I still have it, of course, but the mitigation strategies I used prior to my accident still help me today.