If you start a birth control pack late, will that make your period late i am on first pack and forgot.?

Add condoms: You will have a period when you take the placebo pills (often a different color) or when you stop taking pills for a week, depending on the brand of pills you use. If you start a new pack few days late, take a pill as soon as you remember, and use a back-up method (like condoms) for at least seven days. If you have a hard time remembering, talk to your doctor about other options.