New to this and still irregular probably from BF

Am

Hi! My daughter is one year old and I have decided to start FAM so that I can prevent pregnancy for now and hopefully plan for pregnancy when she’s a little older without the use of chemical BC.

I had my first pp period in August and am pretty sure I ovulated a week ago, so now I’m just waiting for my period to come, but my temps aren’t matching the typical pattern. They didn’t stay higher after ovulating. Does anyone have experience using FAM while still irregular from having a baby/BF?

My pre-baby cycles were longer, closer to 40 days, not 28.