pregnant? HELP!

Right after my period I started cramping on and off for maybe 2 weeks, then it stopped, now my boobs are sore some days, and my nipples are kind of sore. I started a week before my friend which means I should start either oct. 2 or the 6th.. Could I be pregnant? Or do you think my boobs are just hurting cause I may be fixing to start? They been hurting for like 2 weeks, and I've been cramping on and off for 2 so if it's not one thing it's another. Any thoughts?