honey probably helps your guts because you are having hydration issues and carbohydrates can be hydrating because they make your body hold onto water.
you might want to think about soaking some dates in water and drinking that as an alternative, plus it contains magnesium and potassium which might help your intestinal and headache issues.
over that I would suggest upping your fats when you get a change, ground beef is very chincy on fats. if you are skinny you need tons of fats and proteins and some carbs to help them stick to your bones.
I think honey is fine in small amounts, and beneficial if unprocessed. I think you have to find what other carbs work for you. for me I know that how my body processes carbs has everything to do with intuition, season, etc, you have to find what works for you and drop all dogma. the goal is to feel better not to adhere to super strick rules, of course there should be guidelines in place like no processed foods, but if, for the time being, it is btter for you to digest warm or cooked foods that stay within the paleo category know that you may still be able to find healing
really encouraging you to try bone marrow, egg yolks(have you tried just the yolks?!), sourcing some fatty fish like mackerel, getting some backfat and suet. also raw dairy or even just pasturized grass fed butter if that's all you have sources for
try eating these things with a little sea salt or seaweed, chewing on some celery, making a broth with zucchinis and drinking the juice, chewing on a small bit of bitter greens before you eat....etc. something to get your digestion going. I would also suggest dry aging your meat as it will make it easier to digest.
I would encourage you to consider sauna and self massage, stretching, and MAKING yourself just go outside during the day. you don't even have to go far...once around the block and then lay down if you need to and do deep breathing. if you have no activity, don't interact with the sunslight(like cherimoya mentioned, vit D is great to induce restful sleeps) and don't get out in nature during the day you will probably continue to find it hard to gather energy....even if you can find a place close to lay on the ground during the day, somewhere outside, under a tree in a park perhaps? go there! go where there is running water and sit near that as well.
some herbs that might help activate deep sleeps (do you dream?) include skull cap and lemon balm
cabbage juice is great for healing the intestines.
Kelps provide healing healing and protection for the intestines, it creates its own mucilage that should be more helpful/easier to digest then fiber, as well as plenty of trace nutrients and iodine.
if your digestion is extremely compromised I would also suggest taking a probiotic, I suggest garden of life "primal defense" which contains many strains including microorganisms that are found in healthy soil.
I would also suggest taking a supplement, FOR THE TIME BEING, not forever, but new chapter makes really good multivitamins that are food based that also include enzymes and probiotics. no need to megadose but worth a shot to see how they make you feel.