Currently using Primolut n to retard my period so i can enjoy a really important vacation. It leaves me feeling crampy and nauseous, and not confident about it's effectivness and the risk of vaginal bleeding anyway. Does anyone know of a more reliable pill that can just keep the period back a few days, with less unsavoury side effects and that would instill more confidence in me about it's effectiveness. I really need some suggestions/guidance.