Are you shaving every day?If yes, then try maybe once every two days and see if that's better and maybe after a little time you'll be ready for shaving daily.
Well, Crusher, now that you are no longer a rookie shaver, why don't you try an ice cube rub after you shave? It closes the pores and prevents irritation...I first accidentally shaved my head at 13 when I messed up giving myself a haircut on the cheap....As for the last question....I don't know...