I'm only 17 but me and my boyfriend are going to be married so of course we have sex his alergic to latex so we don't use condoms and I'm not on the pill .my last period started the 28th of June and ended on the second of July I haven't had my period since now its sep/7 I have alredy taken some test that turned out negative could this still mean I'm pregnant ?

Go to your gyno, and please go on birth control. You are not married until a clergy person or judge says so. Be safe until then

Go to the doctor, could be a tubal pregnancy that can be fatal if not treated. Also, stress from being worried can mess up a menstrual cycle.

You do need to be checked it can be many things, from being prregnant to infections.

Also they have concoms that are not latex so you have no real excuse not to be using it.

Also active birth control is important if you don't want to have a child,