Hello! I am new to this app and ovulation tests so please bear with me. The app told me my fertility window started today so I took a test and it was negative...no problem. however when I went to the bathroom and wiped I was bleeding again.is it because of the PCOS or is this something to do with ovulation? I'm cramping a tiny bit bit not horribly...if it is a period again can I change the calendar on here for however many days this will last or if it only lasts tommorow?