3 weeks after c-section

I'm currently 3 weeks after my c-section and have some questions, at my 2 weeks appointment I was told my incision looked red and was moist. So I was put on antibiotics for a week, I took them and it still looks red, is that normal? Second: I went to the bathroom this morning 11-27 and when I went to wipe a string of stuff came out, it was like a brown color, normal? This is my first pregnancy so not sure what's normal and not. I see my doctor again 12-16.