Anyone else have "flare-ups"?

Anyone else have "flare-ups"? So I realized that my stutter has fluctuations, oddly: For a few months, it'll be what I like to call my "normal" stutter, but then it'll worsen for the next couple of months, sometimes lasting a bit longer than the normal period did. My speech blocks are especially exacerbated. This has occurred 2 times now i believe, I just wanted to know if anyone else experienced this.