You get your period?

I'm pretty certain i ovulated 16 days ago (which was 17 days after the first day of my period.) I had light spotting which i have read is more than likely through ovulation and estrogen levels dropping. Then exactly 2 weeks after i ovulated (2 days ago) i had extremely light shopping which i also had yesterday.

I came off the pill 6 month ago through doctors ordered (not to get pregnant) and i'm trying to figure out how my body works so any advice would be great :-)