help !!!

can someone tell me why i’m spotting brown ? glow predicts my O day is today. i don’t track. i had sex thursday , sunday and plan to have sex tomorrow. but i’m spotting brown ? i thought it was maybe because my and hubby fooled around last night and when he fingered me he irritated something , but assumed after peeing ALL DAY it would have subsided after the first wipe this morning. it’s never lasted this long before. is it because i’m ovulating ????