I LOVE charting. LOVE it!
I started charting (via TCOYF) after coming off Depo Provera, and I definitely recommend it as a way to get your hormones back to a balance while also learning an amazingly impressive amount about your body. We've been charting and using condoms for almost three years now -- successfully (we're waiting for DH to be done school before TTC).
Anyway, I didn't really recall having any discernable CF pattern before I went on birth control years ago, so I was skeptical, too -- and concerned that I wouldn't be able to correctly identify my CF. But I was amazed when I started seeing the differences in CF quality. Once your body gets to post-BC hormonal balance and you get some experience under your belt (no pun intended!), you'll start to see the patterns.
I hope this isn't TMI ... it took me a while to feel comfortable checking my cervix, too. But I did see that CF --especially the egg-white variety -- will make its appearance after a BM. Toni Weschler talks about this in TCOYF ... and she's totally right. So, if the CF doesn't make an appearance on its own, another bodily function will help you out with that.
Definitely temp! It's the only way to corroborate what you're learning through checking your CF.
Best of luck to you!!!!