my period was due on the 5th of this month, on the 2nd i had a small amount of pale pink discharge with a pin prick of red blood, then nothing on the 4th i had a small amount of brownish blood about the size of a 5 cent piece then nothing, i also went to the doctors on the 4th for blood test which came back negative, today is the 6th and i have had two spots of brownish blood about the size of two match heads, i am worried, what could this mean? i am usually very regular