Is abdominal pain after losing your virginity normal? especially if he went a little too deep and hard once

Sometimes: It is not abnormal. If this was your first encounter, then your genital tract is not used to the normal stimulations and feelings of intercourse. You note that it was hard and deep and that could have caused bumping into the cervical opening which can be painful. I hope your partner is more gentle the next time but it certainly sounds as if there is nothing to worry about.