Fluid retention within the tissue...sloshing or gurgling sound when rubbed or stroked

I am 4 days out from surgery and have noticed a sloshing or gurgling sound, like water in a balloon when my breasts are stroked. The left is worse than the right but present bilaterally. I went from a 38DDD (almost a 4D) to less than a C. Removed approximately 725-750g per breast, no drains, no redness, no tenderness, or other signs of infection. I am having some serous drainage, mostly from the nipple area and the right more than left, enough to leak through my sport bra on the right.