Hey Hive account@thecreativerebel! So sorry for the late reply!
Thank you for clearing up how downvoting works. I think I became a bit paranoid after reading some posts about downvoting comments and posts that don't meet others' level of quality.
However, I realized it's the delegated portion of SteemPower that has decreased (I usually just look at SP on Steemnow.com).
I am still a bit confused on what causes the fluctuation because it had decreased even when Steem was increasing shrugs.

Thanks again :)