Temp rise morning after positive OPK

I started using opks last week and initially I had a line, not dark at all but a line. Then it was gone. So this had me worried that I wouldn't ovulate this month. I know LH fluctuates but I'm a worrier. So yesterday morning I tested and had a faint line. I know mornings are not the best time to test so I took another test in the afternoon with the line getting almost as dark as the control. I tested again at around 8pm and the line was definitely darker than the control. We did BD last night. When I took my bbt this morning there was a pretty good jump in temp. From 97.20 to 97.60. I thought you ovulated 24hours after positive opk and then a temp spike after that. Is it possible I already ovulated? Could I have missed it?