You need professional help.

Not because of anything you've done or not done, but because of the nature of the beast of trauma. Other people just don't "get it." Nor will they, even if a professional explains it to them. To continue to expect them to support you in the ways you need (and I think you aren't even sure of how you need yet..) is a frustrating and ceaseless task.
If you truly have PTSD you will not get "over" it on your own... imo. And, if you have been so traumatized and not receiving help... you could very well worsen with time, also.
Please seek professional help. Get the unconditional support you need and deserve. Quit expecting the "ignorant" to come to your aid...they don't have a clue, hon.
((((hugs))) Go get help.