Luteal phase

So I started spotting very light on Friday (11 dpo) and it continued on and off throughout the weekend getting slightly heavier each day (still very light though). Today is Monday and af has arrived her normal heavy self with red blood. My question is did I have a 10 or 13 day luteal phase?? Aka does your luteal phase end if you start spotting? Seeing my doctor on Wednesday but wanted to pick your brains. Thanks!!