hi i got my period last month but it was only for 3 day and light spotting, i been having bad headaches, frequently tired, and passing gas more. i took a over the counter pregnancy test and it came out negative, so i went to the doctor and they did a blood pregnancy test and that came out negative as we. but im still having the same symptoms except 2 days ago i started vomiting but it only lasted the morning and now im kind of constipated... i was due for my next monthly period on the first but havent gotten it yet..