Sectioning?

Hey there, so I'm currently hanging out at this general hospital in the UK just chillin' while my physical health is getting sorted. The deal is, once they feel I'm good enough to move on, they want to shift me over to a mental health place as an informal patient. Honestly, that idea isn't really sitting well with me because last time I was there, it wasn't the best for my overall healht.

Anyway, here's what's bugging me: if I say nope, I don't wanna go, how likely is it that they'll try to section me? And on what grounds would they even do that?

I've been in here since a really serious suicide attempt, so basically almost 7 weeks now. It's like, how long can this go before things get more intense?

Thanks for any help you can give!