Can you ovulate that early?

I am suppose to ovulate tomorrow according to this app. When I took my first test it was fairly dark but not positive. This was at the beginning of my fertile window. Then I took another one today, just after lunch, thinking I should be getting closer/darker, but it's really faint.

Could I have ovulated that early? Or is there a possibly I'll ovulate in the next day or so? A day ago i had the cramping like I was getting ready to ovulate. I'll test again tonight. But I'm assuming this month will be a miss. Sorry I'm new to OPKs.