Suggest Medicines To Postpone Periods And Also Act As Contraceptives

Respected Doctor Sir I am Geetha aged about 44 years. I am getting married on 28th of May 2010. My Monthly Menstrual Periods Date is on 4th and I do get Periods previous to 4 days from the date. So, I am expecting my periods this month on 30th of May 2010. I will be with my husband from 28 of May till 2nd of June 2010. As there is my Neice's Marriage, I will be coming back to my parent's house on 2nd afternoon. So, I need a medicine which can postpone my periods at the same time act as a contaceptive. How many days it will take to get my periods after stopping Meprate 10 mg once in the night from 27nth May till 1nd June. Please advise I am confused. Thanx.