Is it possible to "postpone" my daughter's period which is due during our holiday? I think I read somewhere that there is something the Dr can prescribe. Would he for someone so young? We are spending a week scuba diving and snorkelling and she has worked out that she is due to start the day we go away. She is only 12 and her periods last 8/9 days........ She's really upset at the thought of not being able to swim (she is too young for tampax).....