Don't fit categories for LCW or PIP - what can I do

I am unable to work due to health conditions however I don't seem to fit any of the extremely specific categorisation for LCW.

Is there anywhere I should be going for support especially financial in this case?

not to go into too much detail, but effectively my health issues lead to me having no control over my sleep with an extremely erratic sleep pattern, moments of extreme drowsiness and not knowing if/when I might fall asleep sometimes this being while doing tasks or even mid conversation. this has led to me being late to work or falling asleep at work or even working on days where I haven't slept in nearly 50 hours.