Old blood??

Sian
I'm on cd 12 today and started having my ewcm and lots of it!! All good!! But it's tinged brown & iv noticed that since my period stopped on cd 6 that when I wipe it's always been light brown? How weird to have old blood still coming out a week after AF has gone? I've never had it before. Just glad it's not interfering with ovulation xx anyone had this? Xx