Ah. Well I'm not a doctor but the physical stuff could be anxiety related. However I always air on the side of caution and have it checked. So maybe take someone you trust with you. You can consent to have others in the room with you with doctors if you want to. And just make sure the pain doesn't have root in a physical issue.
The people doing the assessment will likely by psychiatrists or psych consultants. As far as time in hospital its as long as you need to be more stable. Not recovered. Just no longer a threat to yourself. It could be days or longer. They try not to keep people in for very long because it can feel demoralising. And they don't have enough beds as it is. If you aren't actively suicidal they aren't likely to hold you. Suicidal ideation is a difficult thing though. I think its easier if you explain to them you don't want to die but see it as more an escape (only if this is true but that's what I read from your above post).
You should really discuss this with your former(?) T as they are likely going to be consulted and also to discuss how likely they are to recommend hospitalisation. That will give you a much better idea.
Sure being in hospital helped. It also sucked. It was good in that it allowed me to focus on me and only me. It helped with some stuff and less with others. It also felt like being told I couldn't function on my own. And that sucked. I can't day if it will be helpful for you. Everyone is different.
I would say to try working on grounding more. There are lot of threads on here where people have discussed it. I think it will help with the hiding under the duvet and depersonalisation, disocciation, etc. I would also try not to think about what will happen in the assessment, I know that is difficult but you really have no idea what will occur. And it sounds like your anxiety over it is likely making everything else worse.
The people doing the assessment will likely by psychiatrists or psych consultants. As far as time in hospital its as long as you need to be more stable. Not recovered. Just no longer a threat to yourself. It could be days or longer. They try not to keep people in for very long because it can feel demoralising. And they don't have enough beds as it is. If you aren't actively suicidal they aren't likely to hold you. Suicidal ideation is a difficult thing though. I think its easier if you explain to them you don't want to die but see it as more an escape (only if this is true but that's what I read from your above post).
You should really discuss this with your former(?) T as they are likely going to be consulted and also to discuss how likely they are to recommend hospitalisation. That will give you a much better idea.
Sure being in hospital helped. It also sucked. It was good in that it allowed me to focus on me and only me. It helped with some stuff and less with others. It also felt like being told I couldn't function on my own. And that sucked. I can't day if it will be helpful for you. Everyone is different.
I would say to try working on grounding more. There are lot of threads on here where people have discussed it. I think it will help with the hiding under the duvet and depersonalisation, disocciation, etc. I would also try not to think about what will happen in the assessment, I know that is difficult but you really have no idea what will occur. And it sounds like your anxiety over it is likely making everything else worse.