Confused!! Please help!!

K • Married, 3yo girl, second girl in the way

The last couple days getting closer to my predicted ovulation window I have been tracking often.

3 days ago I got a decent opk- negative but getting dark-ish the next day it was lighter (tested twice through the day to be sure) yesterday was about equally as a dark as the first day and CM was watery. Today my temp dropped so I’m all excited took a opk with fmu and there’s almost no second line... checked cm first thing this morning and it looked more creamy.... I don’t understandddddd

I should note my temps are always a bit erratic like what you see in my chart

I should also note this was my first period since December with the help of Provera.