My periods usually last anywhere from 4 to 5 days but this month it only lasted 1 1/2 days. I need to know if this could be a sign of pregnancy? I have been feeling tired and my breasts are a little sore off and on. Please give me some kind of answer , thank you.

It could be any number of thing that has caused this, but if you think you mite be pregnant,get a prenancy test at your local drug store or make an appointment with your Doctor.