So I had what I thought was my period Saturday 15th and Sunday the 16th. It only lasted 2 days rather than 4 or 5. It was also a lite flow and more brownish than any other period. I've taken 2 pregnancy tests. 1 on Wednesday (3 days later) and the other on Saturday ( a week later) and both resulted negative. I've been more emotional than usual, crying over stupid things. I've had a couple headaches this week (i never get headaches) also, the guy I've been seeing I've known for almost a month now, and I'm not on birth control and no protection was used. I'm worried I'm pregnant or all of this is happening because I'm stressed out? Please help