To start, my period was week late. (<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says it's one week and usually comes a week after it predicts... But this time it was two weeks after the predicted period time.) so now it's a week after my period finishes and now have this brownish discharge in my underwear that has Been appearing the past couple days.This wasn't a usual accurrence. Also, according to my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> calendar, I am in my fertile window. Should I be worried or what should I research it as?