I was actually diagnosed with PTSD in the "early years" of my son's problems. Was under the care of a psychiatrist for about six months, required medication and went for therapy. It is totally possible. And I know that phone-ringing-panic-rising scenario.
Octoberrain, you need a break! Being a living, breathing model of self-respect is good for everyone. Praying you make yourself and your well-being a priority now.