Thought I was ovulating not pregnant! Confused?

Mary

I’ve been trying to pinpoint ovulation for awhile and shorten cycles. I wasn’t sure if I O’Ed on CD 16 but suspected it from CM. So I was not even surprised but excited that this week on CD 28 to get dark opks and even a smiley on a digital ovulation test for my first time! Then I was surprised they lasted more than three days.

Took a hcg test that came with my opks and was floored to see a faint but noticeable second line!

What do you all think??