I have been trying to get pregnant for several months. Today is day 26 of my cycle. My period usually comes on day 25. For the last week I have felt alternately nauseous and like I m going to start my period any minute. Starting last Saturday I have had 4 days of a slight amount of brown discharge. I have taken two pregnancy tests that have come back negative. I ve been unusually thirsty, and last night I had a metallic taste in my mouth. I m going crazy! What is going on!?!?