Anyone sprain their bottom/anal muscles from overuse?

It seems I went a bit too hard on a session a few months back. My PC muscles and the muscles that tense up during orgasm near my prostate were both super sore. My PC muscles have recovered since but whatever internal butt muscles are involved in prostate orgasms will still ache for a day or two if I try to do an Aneros session, even lightly.

Has anyone experienced this before? Do I just need to go a whole month or two without any sessions? I plan on seeing a doctor if it doesn’t go away, I’m just wondering if anyone else has strained themselves in a similar way. It’s kind of annoying because I’ve figured out how to have really good sessions since then.