OPK QUESTION.

M • Married 9-09-2017 TTC for Baby #1 🙂

I took a opk this afternoon (19th) at 12:30pm obvious negative. Took one when I got off work 5mins ago very obvious positive. Now my question is glow predicted my ovulation to be Tomorrow/ today since it’s after midnight (20th) but since I just now got a positive I still have 12-36 hours before a egg is released right? Ovulation could actually occur anytime between tonight and Sunday Morning correct?

Or am I completely wrong on this