12 days post BA, 38A to 600cc any progress? Will they drop and fluff? (photos)

Dear karina1030,
you are still in early stage of recovery. You can expect your breasts to change their shape during the next months. You will be able to see the final result of the surgery only after 4-6 months. 
If you have any concerns, you should consult with your plastic surgeon. 
Daniel Barrett, MD, MHA, MS 

Certified, American Board of Plastic Surgery 

Member, Am. Society of Plastic Surgery

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  It is very normal to be swollen and have high riding implants in the immediate post-operative period.  I recommend that you maintain close follow-up with your surgeon.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

Congratulations on having undergone the breast augmentation procedure. Your plastic surgeon will be best resource when it comes to accurate assessment, advice, and/or meaningful reassurance. There are many variables when it comes to how much breast implants will "settle";  the main variables, in my opinion are your anatomic starting point and exactly how/where the breast implant pocket was dissected. Again, for this reason, your plastic surgeon will be your best resource.
 
Generally speaking, breast implants will "drop" into the pocket that was created during surgery. The rate of breast implant "settling" may depend on factors such as size of breast implant pocket dissected, tightness of the overlying skin/muscle layers, and size of breast implant utilized. Normally, it takes about 3-6 months (for some patients longer) to see the final result.  As the breast implants "settle", the lower breast poles will round out, and the nipple/areola complexes will seem to sit higher on each breast mound.
 
Best wishes for an outcome that you will be very pleased with.