What are the chances of a pregnancy if my current method of birth control is not used or fails? Should my partner and I consider using 2 forms of birth control (such as a male condom and birth control pills) at the same time?

Each birth control method has a failure rate. Even the permanent forms of sterilization, tubal ligation and vasectomy, are not 100% effective. Understand your risks for pregnancy before you have sexual relations. Combine methods to further lower your risk.

Check out the birth control methods and failure rates at this link from the Food and Drug Administration: Birth Control Guide.