hi my periods were due on 31st october, but i had brown colour spotting very little in amount on 27th october,that last for only 2 days,i am confuse whether they were my periods or that was implantation bleeding,I had a urine home pregnancy test i was negative, now I am 13 days ahead my periods,I am still confuse whether i am pregnant or not,my doctor said wait for another week for blood test .