The past few months I had been missing lots of birth control pills. This past month dec. I had brown bleeding when I wiped and then I had red bleeding for about 3 days then the brown continued on..But eventually stopped. This past month I stopped taking birth control and I was supposed to start my period this past thursday the 15th. Today the 21st I have not had my period. I have some cramping and I feel like i'm going to start my period, but it still hasnt' came. So, I took a preg. Test yesterday and it came back negative. But for some reason I feel different and feel like I could be preg. I've been nauseated, tired, irritable, urinating often, cramping etc. Could the preg. Test be wrong??? Please help