I ended up with a third degree tear 14 weeks ago giving birth to my DD. Had a useless midwife who said she'd tell me when to stop pushing, but she just said keep going. So I pushed DD out in 24 minutes, and had a third degree tear! 
Anyway, enough of my bitterness(!), I seem to have healed quite well, despite only seeing a physio last week (they forgot to refer me). She said my muscles have been repaired well but I have a lot of scar tissue, and to massage the area daily. She'll see me again in four weeks and will use ultrasound to break down the scar if necessary.
Has anyone had a tear and then had ultrasound on the scar? My DH and I have had sex a few times, but it's quite painful as my scar has no "give" in it.
I don't always want to be sore, and as our baby is sleeping well through the night, I want to get back to how we were! 