Took premoult N to Delay period. N?

Hi Doctor , I am having my marriage on 2nd Feb 2022. My previous month period date was 6th Jan  and my periods always come 2-3 days early . Currently from 24nd Jan  I am suffering from PMS like breast tenderness , body ache and cramps, and as per doc consultation doc have suggested me to take 10 mg of premoult N till my expected date (2nd Feb ). And have started taking the med too from today . After eating pills at morning i thought the cramps will stop but its still happening is it normal to have cramps even after taking premoult N ? Kindly help on this ! As I am taking this medicine first time in my whole life time I was even avoiding this Medicine. I have no other choice for this too. Kindly explain me in detail so that it Clears my doubt in detail