PTSD is certainly a demon of many heads, it is like you could go on days thinking everything is alright then one noise, one comment, one familiar face, heck even a smell can possibly trigger you and it's like all those days, months or years that you thought you were ok are no longer real, you're back to square one and it's like you're living all of it all over it in your head.
I tried so hard for so many years to try to make sense out of my trauma, to understand, to heal but at some extent I realized I spent like 5 years stuck in a rut trying to explain something that simply does not have an explanation. I got a very rude wakening call - chronic pain -, and my life has changed once again forever. I can't physically get triggered because it puts me in the hospital, so I sort of try to concentrate on the things that I can do something about, like my health and my today so I can actually be certain I could have a tomorrow.
There is no magic trick to this and so far from what I can experience PTSD does not disappear, what changes is you and how resillient you become towards it. What I can promise you is that you do learn a lot from it, eventually you learn how to cope with the pain and how not let it become you. It is not easy, but it is real.
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