Let's take a moment and have you review what YOU see as your symptoms and problem areas. You have been diagnosed with PTSD, which would suggest some of the follow symptoms. I'd like you to confirm or dis confirm whether you experience them. Then, I can talk to you about some treatment or intervention options if you'd like.
First, your diagnosis would infer that you are having such problems as flashbacks regarding this accident or other past traumatic events. This would involve intrusive and unwanted memories or visual images inside your mind of an accident or traumatic event. You are experiencing fear and avoidance responses to anxiety-provoking situations; so you may be isolating yourself and doing things that are out of character for you---escaping and avoiding stress
situations you used to handle quite well. It is common for instance for a person experiencing a car accident to develop a fear of driving or riding in cars and even, a fear of traveling to ordinary places. They dislike being in crowded areas that feel 'chaotic' to them and uncontrolled.
Presumably, you startle easily or have sudden, severe anxiety reactions when certain situations or triggers in the environment are present. You may be having anxiety or panic attacks
from time to time. You have already noted that your sleeping
is disturbed, as is your eating. One would infer that the sleep problems involve trouble falling asleep and staying asleep, as well as early morning awakening, and then, feeling sleep deprived during the day. This sleep deprivation wears on you over time and you increasingly feel more and more tired, and less full of energy, physical strength, etc.
You mention memory and concentration problems which could be related to either the anxiety and depression you are experiencing or to the medication you have been taking, or both.
The medication you are taking for example, is well known to affect concentration, learning memory, and slowness of recall, slowed problem-solving, etc.
You mentioned loss of interest in activities and feeling sad much of the time. This is a depression-related symptom we call anhedonia or loss of interest in everyday activities and associated with it, an inability to derive pleasure from activities one formerly enjoyed.
It is often associated with a loss of sexual interest and sometimes, loss of sexual functioning. Also, the person may become spontaneously tearful for no apparent reason. they increasingly isolate themselves from others because they'd rather be alone, even though they feel bored, and little they do actually interests them.
All in all, your life has been severely disrupted by the accident as have your interpersonal relationships. So if one 'steps back' and takes a look at your life right now, one might say you have suffered some significant 'losses'. Most of what you did
, who you related to regularly, enjoyed, were motivated to 'do' are 'lost' or seem to have 'gone'.
I don't believe you are suffering from a dissociative reaction or have a dissociative disorder. Everything you describe fits the combination diagnosis of PTSD and depression. I've summarized the key symptoms so I'll pause here and ask you to affirm or dis confirm what I've suggested above about symptoms of PTSD and clinical depression. Then we can talk about what to do if this conceptualization of your problems makes sense. I'll await your reply. Thanks for your patience regarding the significant time zone differences.