Ovulated earlier?

Hi guys, it’s my first time taking ovulation tests. My first one on CD 11 which was pretty dark but I haven’t received a positive test yet. glow app says I should be at my peak fertility today and ovulating tomorrow but doesn’t look that way. Do you think I may have ovulated before I took the first test on CD 11? No fertile CM this cycle so far though. Any input would be greatly appreciated ☺️ unfortunately only BD once on CD 10 so don’t know if I’ll have much of a chance of conceiving this cycle if I have already ovulated 😞