Hi, Brandon,
It's not unusual for our tinnitus to change tones suddenly, or even add additional ones! I know that mine does that every so often, and I'm sure others will agree. However, if you're concerned, you might want to go to an audiologist for a hearing test. Have you had an audiogram done recently? Not everyone with tinnitus has hearing loss, although it is common.
Did your tinnitus start due to noise trauma, or was it something that occurred gradually?
We have lots of great information on this forum. Glad you've joined us!
Best wishes,
Karen