I took primolut n for 13 days to delay my period. Now, the day I stopped the medicine, I saw some spotting. I assumed I have started my periods, but the next day I saw the same amount of spotting. Today is the third day, and I have dark brown colored spotting, but more as compared to last two days. Im confused if my period has gone irregular or what? I usually have a 4 day period length, today is the third day but I do not see normal routine of my period. Is it some side effect or what? Im really worried.