can i be pregnant??

my period ended 2 days before Oct.31 , and I didnt know that i was ovulating the 2nd of November and I had sex(unprotected). and its been just about 4 weeks and my period was due on the 17th of November but i got it a day early and it lasted for 3 days.(Idek if it was my period) and a week later I started peeing and sleeping alot more and my stomach has been cramping really bad , and my next period isn't due for another 9 days