N.F.
Just like the other poster...I highly recommend www.fertilityfriend.com I never fully understood how to do the charting myself and this free website does it for you!
I have been using it for 5 1/2 years...I used it to prevent pregnancy for over 3 years and now just use it to track my cycles. I haven't picked back up with temping since I had my little one 19 months ago.