I found a neat tool on webmd.com that may help you. It is an ovulation calendar that helps women find the days of the month when they are fertile. You enter the first day of your last period and note whether your cycle runs on a 28 day schedule or a 30 day schedule. A cute, printable calendar instantly appears and shows which days you have a chance of becoming pregnant. Even though there are disclaimers about using the calendar as a birth control method, I decided to because it was better than nothing. When I could afford to go to the gynecologist I was denied birth control pills because I am over 35, have high blood pressure and I smoke. So, I told the doctor about the calendar. He suggested that I avoid sexual contact 2 days before the pinpointed days on the fertility calendar and two days after. It's about 9 days altogether. It worked for me until I gave in to my husband's advances and had sex one day too soon. My last baby, Alayna, was born on August 20th.