am i pregnant?

october 4th and 27th me and my boyfriend had unprotected sex. my period usually starts on one of these dates 22-27. it hasnt ever been later than the 27th. on october 27th we had sex and thats night i had a little blood,like a dot or two. it was only one time when i went to the bathroom and i saw it when i wipped. i though oh my period is fixing to start, but i didnt have anymore bleeding after that...at all. today is november 2nd i think and i woke up and my stomach was slightly uncomfortable, i went to the restroom, and i had blood. am i pregnant? i did some research and i saw that it said you may have some bleeding during the 1st menstruation period after becomming pregnant. i havent taken a pregnancy test yet. do you think im pregnant?