Yellow oozing, what can this be 3 weeks post breast lift. (photos)

I had a breast lift with a slight reduction on my right breast on the 1st august 17. I originally had serous fluid pouring from my right breast straight out of surgery. 3 days later this turned green. Now I have what looks like a pocket filled with yellow fliud by the t junction. I'm getting a tiny amount of yellow on my bandages straight after showering. I have had swabs taken there is no infection. I have been on antibiotics for 2 weeks. What can this be? It is not painful but it is red and swollen.