Bleeding a week after period?

So. I feel the need to say sorry for the tmi even though this is an <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation tracker</a> but yeah. Myasthenia period ended a week ago exactly, I haven’t been sexually active except oral because I want to avoid pregnancy at all costs especially during my fertile window. Anyway, I noticed I was kinda bleeding today. It’s light and I haven’t noticed anything besides that one time so far, but I’m still a bit concerned. I’ve heard this could happen before/ during ovulation (apparently I’m ovulating tomorrow) but it’s never happened like that before (it was light but like, still a thing you know?). I tried research and it says pregnancy but there’s no chance for that right? If this is another period then why? Is it normal to bleed a lil the day before ovulation/ during ovulation?