I probably would've have noticed without the app, but I've had spotting 5 times this month. 

The first couple were accompanied with nausea and some constipation, and I'm generally alway sensitive to smells and were within 10 days of ending last months period. After those happened I was a little nervous that maybe my birth control wasn't as effective as it should be, so I took an ovulation text and it indicated a slight positive, which shouldn't happen while on the pill but I know it's possible. 

I started spotting yesterday after unprotected intercourse, 9 days before my period should start. 

I took a test today and I was negative for pregnancy hormone. I did take it in the evening and it is more than 6 days before my period should start. Any ideas what's going on? Has anyone experienced anything like this? Does this mean there's a strong possibility of a false negative?