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During the month of July I didn't take my birth control pills religiously and now I think I could be pregnant. I had brown spotting (implantation bleeding?) about a week after having sex for a couple of days. Instead of getting my normal period it was lighter than normal and dark brown in color. I talked to a nurse that works at IVF clinic and she said there was a good possibility I was. I've taken 4 at home pregnancy tests and one blood test... all of which were negative. I have had horrible indigestion, raised temperature, dizziness, increased urination, mood swings and fatigue. I could just be paranoid and overreacting but I'm not sure. I would be about six weeks along if I was pregnant. I'm going to make another appointment with my doctor because I'm panicking. Does anyone have a similar story??