Mystia, You might look into Natural Family Planning. It is free (well other than the cost of the course). Basically, you track your waking temperatures, your cervical mucus, and the position/firmness of your cervix (optional, but it helps narrow down the fertile times0, and then abstain from any genital contact during the few days you are fertile. It is more work than other methods, but it also avoids the cost and potential for medical side effects.
The Couple to Couple League has the best information we could find. Don't let the religious aspect of their program turn you off, their program is good, and well presented. If you follow the program and are good about abstaining during your mucus patch, you'll avoid pregnancy.
For us, the hard part has been the abstinence for those couple of days, because it also happens to be the only time Mrs GGB gets horny.
