AF? Or what?

Okay so I went to the bathroom earlier, and after I went pee and wiped I saw some blood I assume, but it's weird. It's watery and brownish red but more red I guess. Kind of when you mix red water color with brown. It was very odd an I have never experienced anything like this before in my life. AF isn't supposed to be here until the 21st according to glow. Do any of you know what it might be? 
One hour later no sign of the bleeding. 
It started at 3:30AM and at 4:30AM no sign of if. Not on the pad I put on or the toilet paper.