Ovulation Question

Kristen • Hubby & I have been together 10 years, married 11/8/14. Angel Baby - 10/22/15. Rainbow Baby Girl, Maggie, born 10-18-16!
Normally I don't get the "blinking smiley face" on my ovulation test until CD 14 or more. This month I started getting it on CD 8. This is strange to me. I had a miscarriage in October and this is the first time this has happened since then, before and after the miscarriage the "blinking smiley face" has always been CD 14 or later. I'm so confused. I mean my period lasted until CD 5. Could I ovulate twice? What would cause this change?