Bbt and O help


So I am 3 years ttc #2 and just now getting into tracking bbt. Is it possible to ovulate way longer than the 24-48 hour after positive opk? I got a positive opk on the morning of cd15, but my chart (and ava bracelet) has my temps going that I actually ovulated 3 days later. So of course I think I missed my really good window. I always assumed it was the next day or even the day after 🤔