Your period is based on whether you have the proper body fat yet to substain a period and child, and the level of your hormones. Girls these days get their periods so soon because of our diets. We eat high fat foods, so we get to the point of having the proper amount of body fat faster. If you don't get your period until your 15 is absolutely NORMAL. Be thankful if you don't get till you are 15 cause trust me it's not blessing.
Shaving your pubic area is so irritating. It starts to ich, burn you get a rash
...yea unpleasant. It's not necessary to get rid of your pubic hair. Girls wax it off for a more desirable look while in a bikini and such. Trimming it is an option many forget. Trimming it is less expensive and avoids any irriation shaving it off creates.