My Tummy Tuck Incision is Not Healing Properly? (photo)

I had a tummy tuck 4 weeks ago and about a week ago I developed redness and a little drainage from incision sight. My ps removed 1 stitch. Now I am waiting for it to heal or he says he will have to remove another one. Today, I woke up and there is a lot of whitish, yellowish tissue inside. There is a little pain. I use a tiny bit of hydrogen peroxide mixed with water to clean it, then use neosporin and a bandaid a about 2-3x daily. Should I be letting it air out at all? Please Help! so scared!