Hi, I am 41 years, 5 3 in height and weigh 66 kgs. I expect to start my periods in a day or two and unexpectedly need to travel long distance by road. am wanting to postpone my periods, if possible. what would u advise? what medication can i have at this stage to postpone the periods by atleast 3-4 days? (i generally have 5 days period, with heavy flow on 2nd day).