Have you gotten this before you found out your were pregnant?

I am not due for my period in 4 days and I am getting brownish blood. I know brownish blood usually is left over blood from your prior period and I get it once in a while but it's always the day before my scheduled period. I am hoping it's implantation bleeding because it has never come this early before and I am always on time like clockwork! My question is did you have this before you found out you were pregnant? If so when did you get your positive test result?