OPK question

Amy • Married💏 proud mommy to a bright baby girl 😍
So last week I had an Opk result of low (the blank circle) on a clear blue digital. And then 24hrs later I had a high peak smiley face! 
Two days later (today) I did it again and it came back low again. 
Does that mean I definitely ovulated? We BD'd the two peak days. So I am hoping we caught it! 
First month using OPK's so I'm a newbie.