If you're not practicing safe sex...are you stupid or just immature?
If you are sexually active then you could be pregnant but if not then you could just having a late or irregular period.
Having a single sexual partner is being sexually active.
Obviously you cannot be pregnant if you're menstruating - menstruation occurs when you don't fall pregnant. If sexually active you need to learn about your cycles and how conception occurs.
Not to sound gross or innapropriate but: any kind of sexual act such as oral, intercourse, or other "activities". People will say that to be sexually active you HAVE to be having intercourse; but, that is false. :)
Its your period, you get it every month, or sometimes, if your on a birth control, or if something is wrong with your body and its not used to it, then you could bleed until your body is used to it.
why wouldn't it be
If you were pregnant then you'd no longer have a menstrual cycle, if you don't understand that then you should in no way be having sex or sexually active to risk pregnancy. The menstrual cycle is your body preparing for possible pregnancy, when pregnant the cycle is shut down.
True - they become pregnant after having sex. (Sexual reproduction)
You are highly likely to get pregnant (or get someone pregnant). And/or get infected with one or more of the many highly contagious, sexually transmitted diseases. Having unprotected sex is like playing Russian Roulette.
You could..i would totally take a test asap if i were you
Talk to your parents and insure them you are having safe sex.
No it is not true, neither technically or otherwise.