I also have a son and i totally understand your pain, he is five. I was wondering for a long time what does it mean to accept it, and i came to a conclusion that to accept means to be ok with the thought that it may never go away and you have to live it no matter what paying less attention to this pain. I'm at the point when i truly accepted it, but it's still very hard to live along with dp.For example today is a really bad day for me, i feel suicidal and i don't want to live and feel all these exhaustion and intrusive thoughts. I forgot what does it mean to feel normal and do not have a proper hope that it will ever go away. In your situation, don't give up, if it went away once, maybe your body can adjust and it will go away again.