TW: dudes, probably not for you, this one

Anyone else here on Nexplanon? I LOVE IT, IT IS THE BEST. So I've been on it for over a year and I have had zero periods in that time, but just this past month I noticed a tiny bit of... you know when it's kind of clotted and brown? Well it happened again today, and I can't tell what this means.

It's a brain tumor, isn't it, WebMD?