Lmp 21oct 2012, no sexual activity since 30 sept 2012, still not got my periods. My beta hCG level is 10 miu/ml. Is it possible m pregnant or smthng els?

Strange. I would recommend scheduling a follow up with your doctor for a repeat bhcg hormone test. Your doctor will need to see if the hormone level is increasing, decreasing or staying the same to be able to determine what is going on.