I had sex the week after my son was born and we got home. I seriously couldn't feel crap because I had all the numbing medicine they gave you on my privates lol not to mention I was scared to death I was pregnant again afterwards π
I waited 5 weeks and most don't even wait that long, but I personally regretted it because my body took forever to heal and I put myself through a lot more pain than was necessary. But YOU know your body so if you feel ready for it, take it slow, and be careful and stop when you feel too much discomfort.