am i pregnent or is this my period pls help me out

hi im so confused dont know whether im pregnent or is it my period i got my last period on 23/jun/2012 so expected date is 20/july/2012 and my partner never ejaculate but i have seen blood or spotting b4 3 days and now again have seen bleeding but its not light nor heavy and it happened before 13 days of my due date for period last 2 days i just seen very light spotting on my panty then it stopped but today again on evening time i have seen light bleeding so im so confused and need ur help to reply n help me someone