About a week ago, I bleed and I believe it was my period but it was a lot shorter than I am used to. Prior to the bleeding, I believed I was pregnant because I was feeling nauseous, my breast were sensitive, had these weird stomach/pelvis pains, and I was exhausted all the time. When the bleeding started, I thought maybe I was just pmsing but a week later all my symptoms have worsen. Could I be pregnant or is it just my hormones?