Some of my charts have been all over the place, too. I just pay as much attention to my cm, and we try to BD as much as we can throughout my cycle, my DH enjoys that part

I usually can tell even with my rocky temps that I have O'd, as my temps will go up a bit higher than all the rest. Last months especially was nuts because of my lack of sleep.
You may want to try temping vaginally if after a few cycles they are still all over the place. A lot of women have more stable temps if they test vaginally.