6 months pp and sex hurts!

My hubby and I attempted sex around 3 months pp and it was SO painful so we stopped. We tried again at 6 months pp and it STILL hurt soooo much. He couldn't even get in because I was so tight.

Is this cause for concern? I had a second degree tear but I figured I gave it more than enough time to heal. Do I just need to keep trying to loosen things up again?