When will breast implants drop and pain subside?

I had a breast augmentation 3 weeks ago under local anesthesia. I am 5'5, 125 lbs. I went from an A to a DD. (475 CC's) subpectoral. During the operation, I had some pretty intense pain on the left side, in the armpit area. I still have that same pain 3 weeks later. I told the doctor during the surgery... Is there some way that something was hit? Also, I can feel the sides of my new breasts under my arms. They have yet to "drop" and are still quite hard. About how long before they look like normal breasts?