Okay I normally start my period at the end of every month, last month I started getting brown discharge around the 16th or 17th and it lasted for almost two weeks, I've took like 4 pregnancy tests and they have all came back negative! So now I'm just awaiting on my period to come up but still no luck yet, for the past couple of days my lower stomach has been hurting really bad and then sometimes it feels like I'm cramping as if I was on my period, when I eat I get very sick to my stomach within a couple of bites when I'm actually starving and my breasts are slightly tender have been since I was doing the brown discharge, and my nipples are really sore, do you have and clue what is wrong with me?