New Red sore and hot breast following breast reduction 3 weeks ago??? (photo)

I had a breast reduction on the 26 August and it was amazing! No complications and my recovery was going great until I returned home to New Zealand. After a week I noticed my lower breast on both sides were becoming red, hot to touch, and more discomfort/pain than previous days. I went to a dr and was put on antibiotics and 4 days later no change. I did have drains in both sides for three days after the surgery and gently massage as directed. Also still wearing the provided bras day and night.