We tried just before 6 weeks but it was too painful for me. Managed to do it a few weeks later but still have only done it a handful of times total (now 3 months pp). Unfortunately for me (and DH), my sex drive just tanked during pregnancy and hasn't returned at all. I still find it uncomfortable even 3 months out, but it's important to me that we keep trying, even if it's not that great yet. Hoping once our DS starts sleeping more that things will get better...