No need to be repeating ANYTHING when you are at level 13...I am level 26 A-spec, and I haven't had to repeat a single event, except for rare times when I needed an extra 200k to grab something out of the UCD before it disappeared, I would run once or twice around Indianapolis for the cash grab. I still have many events to do as well.
OP, concentrate your efforts at improving your skills at the game, and try to get golds, or at minimum silvers on all the license and special events challenges. It will prove to a be a much more rewarding experience then driving around in a circle in a vain attempt to get XP and further yourself in the game. If you get into an attitude of always wanting to unlock the next thing without completing what you have available to you, you will never enjoy the game to the fullest.