Confused by OPKs?

So I have extremely regular 28 day cycles. I am 90% sure I ovulated on 9/9 as it was CD14 (which is when I usually ovulate), I had positive OPKs and lots of egg white CM, and I thought I confirmed it with bbt tracking. Well, now all of a sudden on 9/14 I should be 5DPO on CD20, but I’ve been having lots of egg white CM again so I took another opk and it seems to be EXTREMELY positive again (like the test line is darker than the control line again). Is this normal? Is it possible I didn’t ovulate when I thought I did and I’m ovulating much later than I normally would or is it normal to get another peak test later in your cycle? I was really think this month would be our month but now I feel really thrown off. Any help would be appreciated.