13 days post Breast Reduction, are my breasts healing correctly? (photos)

It is impossible to tell from the photos but you are asymmetric and the right side looks bigger then the left. You are best to see your PS to rule out a haematoma on the right side.

Thank you very much for sharing your concerns with us. 2 weeks after Breast Reduction, it's not time enough to express a valid opinion of results.On the other hand, generally to avoid the normal p.o. swelling, I recommend to limit the arms movement for two weeks. Also it's not advisable to carry weight and take the antiinflamatory painkillers drugs.Finally, I recommend you always use a therapeutic bra.Respectfully,Dr. Emmanuel Mallol Cotes.- 

It is difficult to tell exactly what is going on, but in your photos it appears that your right breast is larger, darker in color and the skin is shinier reflecting more swelling than the other side. I would advise being seen by your plastic surgeon or his/her nurse. There may be a  hematoma on one side, but again, it's impossible to tell from photos alone.