 [ Symptoms ] how can i tell if my child has head lice and what do they look like [ Disease ] unfortunately no your menstrual cycle is on automatic right now controlled by your brain if it is due to come during your vacation it will most likely come as planned cycling with birth control pills or a hormonal injection is about the only way and even that is not guaranteed think about visiting planned parenthood or a free clinic most will provider birth control pills to you free or at a very reasonable cost you do not need insurance