This is kind of embarressing but.. im 18. And am still a virgin. But have done some sexual acts with my boyfriend, but never had sex. And that was just a few days ago, but I realized I missed my period from last month. I don't know if I'm pregnant, I haven't been stressing, changing my habits, sick, or any disorders to cause skipping a period. Its never happened before either, but I do have irregular periods. They always change times every 3 or 4 months, could that be part of my missing a period?

It could be part of missing your period. But if you are stressing about pregnancy, that could be causing it too.