Is glow right?

So according to my opk test I ovulated on the 10th which would’ve been the day after my period? But the app thinks I’m not till the next few days. Is it possible to ovulate the last day of your period? Is there a chance I could’ve got pregnant? Should I still wait and keep opk testing? Today it was a negative but glow has me in the green?

Confused I guess, this is my first time using the opk tests.

Any advice would help!