16 weeks PP. I think I got stiched up wrong!

I had a second degree tear, and while I was healing I knew right where they were because it hurt so bad. Now when I have sex it hurts so bad in that spot my hubby said he can feel it to. If I feel both sides down there it's like there is a lump where the stiches were. Is this normal? Does it go away? Is it scar tissue?