Hallow Dear, There was medical belief few years ago that I-pill like emergency contraception can be taken only once in a month. However, now there are evidences that such pills can be repeated any number of times after each unprotected intercourse if taken within 72 hours of the intercourse. These pills have typical after effects: 1. Few days after the administration of the pills, some amount of vaginal bleeding occurs. This is withdrawal bleeding and stops within few days. It requires no attention. 2. The following period may get delayed by few days to a week after single administration of the pill; with multiple administration, it may further be delayed. In all, these effects may get enhanced with administration of more than one pill. So the brown bleeding you have noticed seems to be the post pill withdrawal bleeding. It will stop itself. Your regular menses will be delayed by a week to 10 days or may be more also, since you have consumed two pills. These pills are fairly successful in offering the protection against the pregnancy. So the possibilities of pregnancy are very remote. If at all you do not get menses even 2 weeks after the missed period, you may get pregnancy test done on your overnight morning first urine sample to find out your pregnancy status. Alternatively, you may opt for Beta hCG test on your blood. I hope this relieves your stress. Dr. Nishikant Shrotri