Stitches Down there!!

I gave birth 4 weeks ago and I had second degree tearing I received stitches of course but now I feel like it's not healing properly. when I look down there I can still see it's opened near my vagina on the top layer of skin I feel stitches still there underneath as well. I feel like it should be closed up by now. About a week after I had my baby I went in to see my OB she said everything looks fine but I'm still nervous that I won't heal in the full 6 weeks. That's only 2 weeks away , has anyone had thus happen? How long does it really take to fully heal??pls help!