1 day Period? could i be pregnant

I had sex with my boyfriend a few days ago, and during sex, i started bleeding, but we kept going. He did pull out, but by the time i got home i had quit bleeding. the next day, i had very light spotting and was brownish color. we had sex again, and no there is no bleeding or spotting. Im on birth control, and i should still be bleeding. Does this mean im pregnant?