Am I too ill to qualify for PIP?

I have been struggling for several months with the PIP process. I initially was going to start the switch from indefinite DLA myself but now they've asked me to apply anyway.

I am very unwell to the extent that even filling in a form takes energy and focus and strength I do not have. I have degenerative liver disease amongst other things and live alone.
I'm having trouble fitting my situation to the descriptors as it makes no difference if I have aids to cook or wash etc, when I am too ill I am in bed and not doing anything. So, if PIP is designed to help someone with a disability live independently how can I fit that?
I don't have any aids as I never cook but having aids wouldn't help. I can walk but don't as I'm too ill if you see what I mean.
When they ask what I do to compensate for difficulties with activities I can't answer because I simply won't do that activity on, what is now, the majority of days.
I've read the guides and I still can't seem to make my illness fit. I don't yet have a terminal diagnosis but it's known that my level of disease will shorten my life. Please advise.

Reading my question back I seem to have answered my own dilemma. So I should just make it clear that even with all the aids and adaptations I still would be unable to do the activity? Sorry to have been so dense Gordon, sometimes the simplest things are hardest to see.

You absolutely should be able to get PIP for your condition- it's not really a benefit to help with personal independence it's just the new name for DLA.

I am just another claimant so no expert but I have read the guides.

If I were writing your form I would say something like:

Because of -insert condition here (e.g. liver disease)- I suffer from-insert symptoms here (e.g. nausea, extreme fatigue, abdominal pain etc. and I am confined to my bed/bedbound all/for most/much of each day/some days) as a result of this I am completely (or frequently or for most of the time) unable to prepare food or cook meals
Then explain what you do to obtain food e.g. does someone prepare food for you or do you have another way of obtaining nutrition[/].

Basically just say exactly what you've said in your post- that you are often bedbound due to the severity of your illness and symptoms (and write about the symptoms) and as a result of this cannot complete each activity.

The guides in the 'Members only guides' section are amazingly helpful!