Painful sex still after 3 years since baby?

Is anyone else going through this? I'm just wondering when it will actually feel normal agian? It's gotten better in the recent months but before it wold feel like his parts were mad put of sandpaper and would hurt so bad afterwards..it aslo has made my sex drive go down hill

Does anyone know what I could do about this??

Also dr said nothing is wrong just to use lube...just wondering if anyone else has been through this?