Confused about uc50

When I applied for ESA NI stamp (unfortunately due to various reasons I can't get either contribution or income based payments) I had to have my first assessment cancelled due to no availability for an emergency wheelchair and the second appointment I was too unwell to leave the house.
I was very thorough (thanks to help from this website and other sources) in my forms and I really thought being too ill to go to the rearranged appointment might have blown it. I was waiting to see if they would allow me a 3rd appointment when I received my letter to say I had been place into the 'support' group and they wouldn't be needing anything else from me.

To say I was relieved is an understatement.

Wow, thanks everyone! That's really put my mind at ease.
I've had a quick glance at the guides on here and they look helpful so I will read them through when I'm not suffering so much.