I too was a hospital transfer.... needed quite a few stitches. Right around the same time postpartum as you, some of my stitches began to heal. Itchiness and soreness, considered normal and part of the healing process according to what I was told. An infection would entail foul smelling discharge, warm/hot sensation around the area, and redness (labia is paler in color pp due to lack of estrogen's affect on those tissues).
For me, what helped was doing my herbal sitz baths daily, sometimes twice a day. And using the herbal water (from sitz) in peri bottle. Sounds like you are mending well.
Bekah (33): Doula and CNA sharing a great life with DH for 10 yrs now, momma to DS Baron (7/10)