Yes, you do "need" something patagonia, I know that challenge very intimately myself.
I also know that while I did need to get away, a time out, it would have caused problems with my family too. It would be harder for you because your children are still very young, they do not have the capacity to understand.

PTSD is very "inconvenient" for the individual that suffers from it as well as the family.
One's mental house is a mess, and having anyone come in for a visit is intrusive and exhausting. There is a huge desire to say, "hey wait a minute, give me some time to clean my house and get organized" before you come in and ask me to "do things for you".

You need a "good" therapist to help you with that, they are not easy to find either.

I had tried very hard when I was struggling, my family did not "get it", believe me I have fallen down the psychological PTSD stairs many times into experiencing often very debilitating PTSD cycles I did not understand, and ended up retreating to my bed to get "alone" and calm down somehow.

I know what you are craving, I have craved it myself, and have "yet" to actually get it too, myself. I hear you.

((Caring Hugs)))
OE