Hi there. I m a 21 year old female, and have irregular periods. I use a health app to keep track of all of my periods and have for over a year now. It tells me when a prediction of when I m ovulating and the day my menstrul period is suppose to start. According to my charts, I was due for a period on July 17 but it never came. On July 25 I woke up to pee, and there was dark brown discharge after I wiped. I thought maybe it was the start of my period (which it s never started with what looks like old blood, it s always started out pink or red) It s been this way since then, but only when i wipe or insert a tampon for 3-4 hours.. but it hasn t ever been an excessive amount. The picture is the most I ve had. I haven t had any cramps what so ever. No pain at all. What could this be?