My last period- sept 20 & i have an irregular period (40 days) my bf & i had sex oct 5-my first time. only wore condom in mid-end. it didnt break, & i took planb onestep within 3 hrs. i havent gotten my period yet & no symptoms, could i be pregnant?

Yes: The excited male secretes sperm in their sexual fluids at all points of their erection. The "main load" contains a higher concentration but there is no point you would not be at risk of pregnancy if the penis is not covered with a condom. The plan B should prevent pregnancy when taken that soon, but sometimes does not. I would expect you are not pregnant.