Should I be concerned? TMI content

I went to pee it burned a tiny bit (hardly noticeable), then i wiped and saw this... I freaked out and wadded up a piece of tissue and put it up in my vagina a little bit to see if it was coming from there and it was clean... Could it have been from my uethera and i have uti? Or is it not even blood? It bright lighting it looks yellowish brown? Help me out here someone...