My boyfriend and I had sex 11 days ago and the next day he had me take plan b because of a mishap with a condom. 3 days ago I noticed a brownish discharge which I though was period, it was very light and without a tampon or pad did not "leak" at all. After a couple hours I put in the tampon and after taking it out I noticed it was barely covered, and what was there was a normal white discharge and a brownish discharge. I had mild cramping and have noticed mild changes in my diet, nausea, fatigue and my mood swings seem more severe than usual. This discharge is very light. I took a preganncy test and it came out negative but I'm afraid I tested too early to be an accurate reading. My period is due next week and Im usually right on schedule. All in all I feel like there's something up, what should I do?