well, there is a chance...you have to get pregnant so many days before a period to stop the next period but I don't know what that is. you would have to research it. but likely this one isn't coming because of stress. all the crazy stuff you are trying is not having any effect at all. you can stop. why cant you take tests? that would be the easiest way to relieve your mind. it is really simple, just pee and look at a stick. you can do it in the stores bathroom. if you are having difficulty getting out, contact your local domestic violence shelter. they will help. welcome to psych central. you will find we have several forums where you can post about your concerns and receive feedback from other members. you will get a lot of support here. again, welcome