Ovulated...Twice?!? 🤔

Sooo....I got a positive opk on 2/21 followed by a negative opk the next day so I quit taking the opk's and crossed my fingers that AF wouldn't show up. AF was supposed to start on 3/8 and still no sign. However, I have had several negative pregnancy tests and something made me take a random opk today (3/10) and it was positive!! That means I apparently am ovulating for a second time this month...? I didn't even know that was possible....anyone have any insight??