PTSD isn't for sissies.

When PTSD is caused by childhood trauma, the coping mechanisms the child engages work well...sometimes too well... until one begins to mature and then they (the old coping mechanisms) begin to break down and not work with the more "rational" adult mind. This could be why it feels like everything is falling apart... the barriers begin to fall down... and what the child lived through becomes revealed... a very tough process.