Could i get pregnant one day before my period? is it likely?

It is not likely.: If you have regular cycles such ad between 28-32 days and you see your period always on time then it is unlikely to get pregnant one day before your period because you body is preparing to throw out all the elements needed for a pregnancy as a result of a fertilization not taking place. If your cycles are not regular that means you can ovulate anytime, so a pregnancy taking place is possible.