See here's my problem... I'm 17... and haven't had my period for 2 months now... the last one was the first week of September. Ive had the usual symptoms (extreme sleepiness, headaches, nausea, lots of stress) but I haven't taken a test yet, because Im too afraid of the answer. The thing is, I haven't had sex yet. I do have a boyfriend but we haven't gone that far. But I've heard there's other ways of getting pregnant. What should I do? Ive been so stressed out because I'm no where ready to have a baby.

Only way to know for sure is to take a test. Not quite sure the other ways you may be referring to but the only way pregnancy will happen is if his semen gets into your vagina... so if you were just fooling around, but there was not actual penetration, it could still happen... not the most likely way, but possible... (depending on what you were doing of course). If you didn't actually have sex, the odds would be quite small that you are pregnant.
Your period may just be off for no apparent reason, or the stress may effect it as well. Do take a test so that you will know one way or the other.