Oh (((((SleepingDogz))))),

That is what PTSD can feel like. Are you able to see a therapist? You can get past feeling this overwhelmed. If you pay attention this kind of overwhelm comes in, crests, then receeds. I felt like you are describing and it was hard for about six months, but luckily I had found a good therapist and working with him significantly reduced my feeling that I was all alone as you are describing in your post as feeling. Sleep was a challenge for me too.

It can feel like no one understands just how overwhelming it can be, but there "are" people that actually do. I have had to work through that myself. Do NOT give up because you can get past this stage.