bbt question

would it matter if you take your bbt an hour earlier than normal? i normally do it at 4 but i woke up and did it at 2:30 thinking it was 4. if i go by that temp then i have quite a bit of a temp drop. about 1.0. if i go by the time i usually did it than it was about normal. which temp do i chart.

i got a regular positive on saturday, peak yesterday and another peak OPK this morning. my cm isn’t completely egg white anymore (only stretches about half the way and is a milky color right in the middle) did i ovulate yesterday?