Hey! I have been trying to conceive for 2 months now after a miscarriage in June and a DNC in July. I use the ovia app to track my fertile window,CF, etc. Today it told me to take a pregnancy test, came up negative

this evening I had some light pink spotting with some small clots and cramping. My period isn't due for 4 days and My periods have been pretty spot on. Do you think I could be pregnant?
Re: Implant bleeding?
Edit: grammar