I've only have only had my period for a short amount of time I'm on I believe my 3 or 4th, but anyway every single one of them comes on in a dark brown or reddish brown every time. I read up on it and it said it was normal at the beginning and ending of it but, for me it's like that through and through. I believe while on my period 1 day it looked a normal red color. Also I'm not totally on schedule yet it's to early, but no it does not happen in between my periods.