Breasts are getting BIGGER two months after reduction. Why?

You may be doing too much in terms of physical activity this soon after surgery.  If you do something that results in swelling, stop.

require an evaluation by your surgeon to determine what could be causing it.  I've never seen a breast get larger in the early post-op phase in my patients so you should see your surgeon to be evaluated.

Do not stress too much as swelling can fluctuate over the first few weeks following a breast reduction, and to a lesser extent over the first few months. Perhaps your breasts are fluctuating in size under hormonal variation now that you have stopped the pill?  A breast reduction is an absolute procedure- for example, if your surgeon removed 600g of breast tissue then your breasts must be 600g smaller. The only way for your breasts to grow in size is if you put on weight. You will not see the end result of your breast size and shape for at least 3 months. If you are still concerned, I would check in with your surgeon.