Had period that was not normal and the past 12 days i have felt tired , fatigued, cramping and today i had a little blood string do that mean im pregnant

Please : Please take a urine pregnancy test immediately to be sure. If it is negative, wait two days and if you still don't have your period then re-take the test. If you still don't get your period then see your doctor and have a blood pregnancy test, which is more accurate. If you develop pain, spotting/bleeding, or feel light-headed, then you must go to the er.