If your pills are 21 days 'on' and 7 days 'off' (in other words, seven pills are there to give you a period), just take 20 days on and 7 days off from now until the wedding. That will move everything up so your period will be all done by the time of the wedding.
If you are taking b control either take the "white pills" a week early or don't take the "white pills" and don't have a period until you come back
You can manipulate your period by the pills you take...decide whether before or after and thats when you take the pills that allow you to have your period if that makes any sense lol