Pregnant or nah?

I hate to be the kinda gal thats like "omg am i pregnant i had sex blah,blah, blah" but I'm concerned here. I had unprotected sex October 8th, was supposed to have my monthly period around the 11th. Well it came on the 11th and ony stayed around for 4 days (stopped on the 14th.) So now i am due to have a period any day now but ive been up and down all night puking, ive been super emotional (also going thru a break up and visitation issues with my sons father,) and been sleeping alot (also again, my sin has been sick to ive been sleeping when he has)

Is all this coincidental orrr am i pregnant?