With PCOS, your cycles already run close together, which makes delaying a period trickier. There are hormonal tablets doctors prescribe specifically to push a period back by a few days when started early enough before the expected date.
Next Steps
Ask your gynaecologist about the period-delay option suited to you, started about 3 to 5 days before 25 November so your cycle shifts past the wedding. Mention your PCOS so they pick what fits your case.
Health Tips
Don't buy a hormonal tablet on your own for this. Starting it too close to the date, or choosing the wrong one with PCOS, can make it not work in time.