Hi, I had unprotected sex on the 5th of January 2013 and was due for my period on the 15 of January, but on the 12th, I experienced a clear discharge with a brown tinge for about 4 days. It wasn t enough to fill a tampon , and on the third day I forgot to put in a tampon and no spotting or anything was found in my underwear or when I used the restroom. I now have a clear, almost watery discharge and have been having sever diarrhea . What could be the cause?