Is this PTSD related?

Hi Everyone this is my first visit here
21 yrs ago i was involved in an unusual incident.All my life i had claustraphobia but it was minimal and only affected me avoiding lifts and really small spaces.This is what happened...i was fishing in the mountains with my friend and his father.It was just getting dark so they headed back to the car and it was cold so they put on the warm airconditioning.After my 1 mile hike back to the car i jumped in and closed the door.It was hot in there and i panicked as the doors were centrally locked from the front so i couldnt just get out.I had what i now think was a massive panic attack and couldnt move or talk.It felt like an explosion had gone on in my brain.Catastrophic.I kept quiet and was subjected to this fear/anxiety/panic for another 4 days before i went home.From that moment 21 years ago my life completely ended.
From this incident i developed lifelong depression,anxiety & OCD.Been to psychologists,psychiatrists for 20 yrs now.Have been on antidepressants(all of them) and benzos for 20 yrs without much success.
My question here is that even after 20 yrs my mind & body experience similar feelings from 4pm - 7pm,about the time the incident happened.The strange thing is i dont get flashbacks,my body just seems to go into anxiety mode.I cant do much during these times,it seems rooted in my subconscious.
Thanks for listening,i hope someone can help with advice

Hi, welcome to the forum

That sounds like a horrible incident, coming from someone else who really hates being in situations where I don't feel I can escape also. Have you found therapy has helped you in any way even if the medication hasn't? It can take a really long time to find the right fit in terms of medication so I do hope you get there in the end.

In answer to your question, in my own personal opinion purely as someone with PTSD I'm not sure if what you're describing is it. However, I'd say it's definitely worth talking to a doctor about it as i'm obviously not in any way of a professional. All I'm going by is my own experience and knowing that in terms of diagnostics, experiencing flashbacks where you believe in every way you are back in that place reliving the same traumatic incident is the core symptom of having the disorder.

I think what you're describing is more linked to the existing huge amount of anxiety linked to that particular time of the day which is really horrible but please speak to someone about this aspect of how you're feeling too.