Not looking forward to having sex during my period on my wedding day.

1) does anyone know if I can move forward or back my period one week if I just change when I take my sugar pill? I’m on a low dose pill that just helps regulate stuff. Been on it for 6+ years.

2) looking to not get pregnant but don’t want to use condoms. Going to try pull out method. But when is the “best” time to have sex to “avoid” pregnancy? Before, during, or after my period? I know not during ovulation. But I’m new to tracking my period so closely for when I’m ovulating.

ANY tips would help.