I just had my menisteral cycle about 3 days ago, but it was not my normal menisteral this one only lasted 1day 1/2. Im worried i might be pregnant, i have been really moody, tired (like i havent slept in days), cramping in my lower abdomen, and the week before i was spotting drops of blood but i did not start my menistral cycle until this past sunday afternoon, and endded Monday night. What is the possability i could be pregnant?