Have you had unprotected sex during the time period you did not take your pills? If so, you need to inquire at a pharmacy ASAP if you can still take the Plan B pill. You are on a strict time crunch as to how long afterward you can take it. You need to know this information and the cost for now and future mess ups. 3 days?!?!
Until you are back on schedule with your birth control pills you need to be using condoms.
Call the doctor who prescribed the pills and ask what to do. We are not a walk in clinic and a small human can be the result of inaccurate information.
There are instructions if you miss 1 or 2 days but when you miss 3 or more you are instructed to contact your doctor because the situation became a lot more serious.
https:// www.webmd.com/sex/birth-control/forgot-to-take-your-birth-control-pills
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