Confused

I didn't have sex until I got married 4 months ago, so I'm new to everything. I have never spotted during AF. At the beginning, I'll have a light flo but it's definitely more than spotting. I have been spotting since yesterday very lightly, between light pink and brown. I also don't normally have cramps and I have been cramping. I thought it was implantation but discovered it could be ovulation. How do I know what it is?