Squirting

I learned that I knew how to squirt since I was 18 years old, so now at 25 I’m a very comfortable squirter lol

If it gets on my sheets I can tell it’s clear maybe slight yellow color, but recently my squirt has stained dark brown... but my period doesn’t start for another 2 weeks and I know my partner/ or I are gentle enough not to create lesions inside of me. Any idea why the change of color?? Has this happened to anyone else?