Thanks for the query.
is an oral contraceptive
pill ( you should be aware that it is a contraceptive also since you are getting married )
If you take the pill regularly, without missing any pills, then as long as you take it, the period would be delayed
Hence the doctor has prescribed it to you for 35 days, instead of the usual monthly pack.
Once you stop taking the pills, within maximum a week, generally 2 -3 days, you should have your period.
It does not cause any problems with the subsequent period.
It is perfectly safe for you to take the medicine as prescribed