I've never really gotten a clear answer as to whether I have PTSD or not, but I can tell you some of the things I experienced and maybe it will help?
When I was 12 I was diagnosed with a chronic illness and my life when completely off the rails. One of the medications they put me on made me really sick and I couldn't eat, I lost a dangerous amount of weight and developed an adverse eating disorder, paired is extreme emetaphobia which I still suffer with
PTSD(?) for me was refusals to eat and becoming very panicky and distressed when I was forced to eat. It was feeling sick all day everyday when nothing was wrong with me. It was staying awake all night listening to the sounds outside my bedroom in fear someone was throwing up. It was wearing masks everywhere I went (pre covid) because if there was a chance someone might give me something I had to do everything in my power to prevent it. The sounds of gagging and retching in movies sent me spiralling and it would take me hours to feel okay after it. I sometimes still lie in bed at night and convince myself that I'm sick even though everything was fine a few minutes ago. Every so often I'll have a flash of what it felt like waking up from my first seizure and it terrifies me.
Idk, all of this might just be my OCD, but I thought I'd share, maybe something can help.
As for the mental health wards, I was on and ED ward for about 4 days (unrelated to my ED they just ran out of room on the other wards lol) and I have to say i was probably my least favourite ward I've been on.
I remember their room was across from mine, 4 girls stayed in one giant room, they were all long term so they had practically moved in, they had their quilts and pillows from their bedroom, they had artwork pinned up on the walls and the such. I do a lot of hospital writing and when I have a longboat character that's something I always like to add, they have to move their whole lives to the hospital so their rooms become decorated like its their bedroom at home.
I remember the big room at the end of the hall, it had a lounge, a air hockey table, a mounted TV and a long table in the right side of the room. Every breakfast lunch and dinner the girls would leave their rooms and all sit around the big table. The nurses made the roll up their selves so they couldn't hide food up them, and they watched over them like hawks. I never ate with them, I just sometimes went to the room to play air hockey alone, but it was pretty harrowing sight, they looked like ghosts, some with feeding tubes and some in wheelchairs and stuff, freaky.
Anyway I have plenty o hospital stories so if you need any more I'd be happy to share! Hope this helps!