Is your ear swollen, warm to the touch and/or unexpectedky painful? If not, I'd encourage you to roll with Jayne's suggestion, or get some glass SF plugs with large fronts and have your piercer swap them out for you. Often piercers will do it for free if you buy the jewelry from their shop. They will also autoclave it for you and clean up your piercing to ensure a clean swap.
If you are having any of the symptoms I described above, go see your piercer and have them take a look at your ears. I was pierced and stretched exactly like you were. I had no problems whatsoever. The only difference was my initial jewelry was glass instead of steel. I had my piercer have a look at my ears after a few weeks anyway just make sure I didn't overlook anything.
Short version, if you have any issues, it never hurts to talk to your piercer. They can be quite helpful.
Best of luck!
Battle not with monsters lest ye become a monster; and if you gaze into the abyss the abyss gazes into you.
-Fredrick Nietzsche
Pericings:
2g Lobes
6g Septum
Want:
Frenulum Linguae
Left inner conch
Right helix