Confused on bbt and opk

So my bbt indicates I either ovulated cycle day 13 or 15. My opk was positive late night of cycle day 13 and all of cycle day 14.

I do not have any medical issues and have gone through testing for hormones etc but still supply little to no CM .

Today cycle day 17 I have creamy CM.

I don’t know what’s going on and why none of it is lining up :( any insight ??