I am wanting to start doing NFP as a way to prevent pregnancy along with using condoms. I do not want to take hormonal bc and I do not think condoms are enough protection on their own (I got pregnant with my 3rd child using condoms). So how do you do NFP? I know some track by callendar & I've heard something about tracking by temperature. Any info about how you use NFP or any links to sites that explain it would be awesome. Also how long have you been doing NFP and how successful at preventing pregnancy has it been for you?