Hi Cuddlybear.
Thank you for posting your concerns and photos post breast augmentation.
Firstly, as much as you may be disappointed at the persistent asymmetry, I would give it a little bit more time and consideration before undertaking revisional surgery. If asymmetries in size/shape between the two breasts were mild to begin with, many surgeons would opt to use the same size implants (with the understanding of course that there will be some persistent asymmetry after surgery). This is because it is always better to use implants of the same dimension (height, width, projection) if possible. Differently dimensioned implants will give a different look to the augmented breast, even if the volume has been balanced. Of course, if pre-existing difference in size were more significant, then this may warrant the use of different sized implants, or removal of some breast tissue from one side, depending on the clinical situation. 
I would suggest close follow up with your surgeon to discuss the outcome and any concerns that you may have.
All the very best.
Dr Ray GohValley Plastic Surgery