Still Too Big After Breast Reduction

Any reoperation always involves risks. Your surgeon should advise you if benefit outweighs risk. There is never any guarantee on final cup size after reduction, tissue must be left so the nipple and skin heal properly. From your photo, the size looks satisfactory.

After any surgery, including your breast reduction, the healing process is a journey and it can take 6 months to a year to see your final result. The body's response to surgery is like its response to any sort of injury and includes swelling and inflammation. The swelling, while likely much improved at 2 months, is not completely resolved and can persist for several more months. You may find at the six month point that things are much closer to your initial expectations.
If you are still unhappy at that point and want further reduction, that can be easily performed either with further direct excision, liposuction, or whatever plan you and your surgeon decide upon. Risks are similar to your initial surgery, such as inability to guarantee a cup size, possible changes to nipple sensation, wound healing complications, and possible changes in the ability to breast feed in the future. Hope that helps.