My period ended 9 days ago and today I noticed a red spot on my white discharge. Later it became completely red like how it happens during periods. Just want to mention that I used to take Krimson 35 birth control pills for my PCOS (cysts were gone 3 months after I started taking the medicine but I continued it for 2 years) and I left it at this cycle only, meaning I am supposed to start new pack on 3rd day of periods but I didn't, so I left it 11 days ago. Could this be the reason? If not can someone tell me what is the reason for red discharge suddenly without periods?