My sister has been trying to get pregnant for the past year. She decided last month that she was gonna wait. She was gonna go get put back on birth control. But she went to the ER a couple weeks ago cause she thought she might have a kidney stone or something. They told her she was pregnant. She's 5 wks and 3 days now. So my advice is to just be patient. It will happen when you least expect it.
I suggest reading "Taking Charge of Your Fertility". I wasn't successful after 2 months and someone recommended I read this book. It has a lot of information in it, including charting, looking for signs of ovulation, Natural Family Planning, and other misc. stuff. Check it out at your local bookstore. Very informative.