What is White Substance after Breast Augmentation? Am I Healing Correctly?

Difficult to say without pictures.  If you are having white discharge after breast augmentation then the first thing to consider is infection.  It sounds like your surgeon has and the antibiotics where not has helpful. You may need to have this discharge analyzed to see what type of bacteria are present if any.  Continue to follow up with your surgeon so that this situation is closely monitored.

Dr. ES

You noticed drainage from your incision 10 days after surgery, but did not see your doctor until 3 weeks after surgery. What happened during this time? Did your incision continue to drain for 11 more days until you returned for recheck?

I am always concerned that if a breast augmentation incision drains fluid out, then bacteria can use this tract to "get in." If the fluid tract actually communicates with the implant pocket, then the implant can become contaminated or infected. In my experience, no amount or strength of antibiotics can "cure" an infected implant (including referral to infectious disease specialists and IV antibiotics.) If this is the case, every plastic surgeon is forced to "bite the bullet" and tell their patient that the implant has to come out, the contamination or infection be resolved, and the scar tissue allowed to soften and heal before replacing the implant. This can take weeks or even months. NOW you know why it is such a hard thing for your surgeon to admit there may be a (serious) problem here.

On the other hand, a simple drop or two of drainage from an incision that heals slowly or incompletely as the sutures dissolve may easily and prudently be treated with antibiotics, this should resolve it promptly. The fact that you are online asking about something that is now 4 weeks and counting is concerning.

Side note: do not use Neosporin--it contains Neomycin, which causes allergic reactions in 10% of individuals who apply it on a continuing basis. This can cause skin breakdown and continued weeping. Use careful cleansing with soap and water, and if you must apply anything, use Bacitracin. Good luck.