And thinkingman, I also thought it would be impossible to recover until very recently, thought it was pointless to get a therapist as there is no cure for PTSD. However, a cure isn't necessary, but a healing process, hope is. I fear you sound hopeless sometimes, that is why I am encouraging you to find a trauma therapist, when you are ready. You sound angry too. And it sounds like you have valid reasons for feeling angry about losing your parents and having no one to rely on. I'd be angry too.
I realized myself, that I was never going to be the same. And I that is why I was angry at my husband. It took me a long, long time, as I said, 2 1/2 years to accept the new me. Changed, altered with this PTSD, for life, but still a worthwhile human being. I think PTSD can make you feel less than. I've learned it's not less than, but it's different for sure. Going through the mourning process, of who you once were, how you remember you felt before PTSD, is a personal process, and each has to take their own time going from that to acceptance.
I also discovered that accepting a changed you is vital to beginning the recovery process. I think you are still in the fighting stage, not wanting to believe everything you've had to endure and become because of PTSD. That you've had to fight to survive, etc. That's okay. You don't need to fight it, although we do, because we don't like feeling bad about ourselves and the world and the people in it. You are reaching out here, that is an important step. You should be proud of what you have accomplished in life....surviving without parents is a very scary place. I can only imagine how that must have made you feel. Angry and betrayed and scared are very normal emotions to experience under those circumstances. Have you thought about how self-reliant you have become? You may have been forced to fend for yourself, but you have done it.