I have bee in birth control for about 2 years now, since I've started, my periods tend to be shorter and lighter every now and then but other months will be regular. Last month it was normal but this month seems to be very different. i usually start my period the tuesday night of my "sugar pill" week and thats what i expected this month as well, except that now i seem to be having some kind of dark brown discharge. it has happened before where i have this kind of discharge at the end of my period but never in the begging and not for more than one day. I've been having this discharge since last night and seems to increasing a bit, its the brown discharge along with clots. Could i be pregnant? i did have unprotected sex. Should i visit my doctor? or continue my birth control as usual? also i seem to be having a yeast infection.