My doctor said 6 weeks also. Whatever you do, use birth control, since your uterus needs a rest before the next pregnancy.
I say go for it. Hubby and I tried about 10 days after I had my baby naturally (bleeding had stopped, stitches were healed). It is painful for me and we still haven't done it and my baby is 1 month :( this is my first baby so I don't know if it's normal.