Hmm. sounds like things are still recovering from the vaginal delivery. it can take a while. personally I would not go for stitching/restitching so soon after a birth. 6 months on I'm still sore from dd3's delivery (which had no tearing or stitches but I noticed this week, when my periods came back too, how sore i still am)
the correct official mumsnet answer, of course, is to use a MOONCUP. (see various threads on this. Mrs D I hope you are listening )