Ovulation question.

My <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> said I should have ovulated on the 6th. I’ve been testing with ovulation test since the 6 and all have been negative. Do you think I could have ovulated before that? Or possibly didn’t ovulate yet? My line is SUPER light I’ll post a picture below.