Had protected sex back in the beginning of june, got my regular heavy period on time with cramps at the end of june. now im late for july. pregnant?

If you have not : If you have not had any further sex, then you cannot be pregnant. If you had a heavy period, then you would not be pregnant from any sex before that period. Do a pregnancy test if you need to know for sure.

Not likely but...: Since you are sexually active and late (how late?) you could just go ahead and check OTC pregnancy test to be sure and for piece of mind, especially if 1-2 weeks late. There is no certainty when it comes to being pregnant or not unless you completely abstain from intercourse.