I really recommend Taking Charge of Your Fertility by Toni Wechsler. I was really frustrated when I first went off the pill by spotting, erratic cycles, major anxiety, etc. When I learned how to monitor my body, it helped me to know how things were working and whether I was ovulating and all that. It's definitely not a "laid back" way to go, but if you hate not knowing/understanding, I give it a thumbs up!
-------------------- Christine
Those who can do; those who want it done better teach.