You might check any paperwork you received in your sign up for the photo class, often times there is a statement to the effect that you would not be entitled to anything and have granted permission to be photographed while in the class, I know our local colleges all put a clause of this nature in their paperwork for photography classes, also at the time she was taking pictures of you, you must have concented to having her do it? Really it does not sound like your entitled to much of anything..