I highly doubt you are pregnant. You can bleed for many more reasons. If you are not ready for a child or too young, don't have sex, or at least use protection (condoms birth control).
If you had sex(he penetrated you), then your "cherry" did pop. Not all women will bleed when they first have sex and you don't always have to feel pain your first time. And, many times a woman will have her "cherry pop" long before she ever has sex, as you can break your hymen from playing sports, horse back riding, or using tampons. Spotting can be caused from a number of reasons, so try not to think too much about it. It could just be from irritation from having sex, infection, hormonal change, or something else, and does not automatically mean pregnancy. As long as you used the condom correctly, your chance of pregnancy should be very low. If your period is late, you can take a home pregnancy test to help put your mind at ease, but I doubt you are pregnant.