BBT confusing the hell outta me

Ok so this is my first time having to actually realllly ttc since with my first I tried one time and bam I was prego but ttc the 2nd baby has been a challenge. I had a period over Easter weekend then got my nexplanon bc removed on April 24th had a negative pregnancy test may 3rd then a positive may 10th long story short I had a missed miscarriage and had to have a dnc June 15th. Got my first official period on July 23rd so it’s time to start ttc 😝 I’m so excited but at the same time scared because I’ve heard sometimes you won’t ovulate for a few months after a dnc so I’m doing everything and anything 8 can to help me conceive quickly. I’m doing the ovulation tests and the daily cervical mucus check along with taking fertility vitamins but I really wanna try doing the bbt thing but it’s not going so well. Just out of curiosity when I tried doing it the first time I took my temp like 10 times in a row and every time I got a different temp it was like 97.03 97.70 97.34 97.63 so how the hell am I gonna know when my temp changes to show ovulation?!?!