Ahhh sabar je sis, luka vaginal memang lama sikit nak heal especially when you're pregnant, a few of my mum friends went through the same thing around third trimester and it took a good 1-2 weeks or more depending on how deep the wound. Since your GBS came back negative that's good news, tapi memang kena monitor je kalau ada bleeding or if the discharge smell weird or berubah drastically, best approach is just check in with your doctor again at your next visit atau call the ward kalau worried, sebab pregnancy hormones boleh buat healing slower than usual. The fact that baby is OK tu the main thing, your body will recover, don't stress too much!