Infection or something?! No pictures but probably a TMI

So I'm exactly 4 weeks PP as of today. Last night I noticed during my stiches check that I do every few days (I had issues with them at the beginning) that it looks as if my labia had been chaffed to the point of looking like a huge, scabbed over rug burn!! It's sore and a bit itchy towards the opening, and I noticed I have a huge increase in discharge as well. There's no swelling or anything of that sort but I'm worried about. I had two tears that I have pointed out on a diagram below, the one in my vagina is about 2 inches long and has several stitches while the other was small and only needed 1. Circled is where the rug burn looking part is. 
I was afraid at first that it was an STI, but considering the fact that I haven't had sex since a week before birth and that my fiancé and I were both each other's firsts, I don't know how it could be that? It could also be the fact that I've stopped using my giant maxi pads two days ago and just use a liner in my granny panties. They're cotton and are a bit tight down there... I'd rather get a few opinions from you guys before I call my doctor. Help 😞😞😞

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