Sorry things have been so horrible for you lately.
Lots of good suggestions from others but thought I'd throw in a few things that are working for me. I think that being in pain can be so consuming that sometimes it is easy to let things like good nutrition slide into the background.
Over the last 6 months I made a commitment to myself that I would nurture myself with the food choices I was making, I guess I just came to the realisation that my body needed me to give it a little more attention. I eat a plant based diet and don't have any animal products but the follow ideas could be easily adapted to any type of diet.
I make a green juice every morning with various combinations of spinach, cos (romaine) lettuce, silverbeat, spinach, various kinds of kale, parsley, bok choy, endive, broccoli etc. I often throw in an apples or orange and the juice of a lime or lemon. There are lots of juicing options and overtime i have been able to reduce the fruit and increase the greens.
I also have a high speed blender and do a couple of different smoothies throughout the day. I make mine with water but you could easily add in some type of nut milk or dairy if you consume it. My smoothies tend have more fruit in them but i still have some type of green leafy vegetable and a cucumber. Any seasonal fruit can work in s smoothie and i keep a supply of frozen berries, mangoes, pineapple etc in case my fresh supplies are running low.
Some of the extra add ins in my smoothies include, chia seeds, maca powder, sunflower seeds, pumpkin seeds, flax seeds and a pea protein powder. The options are endless and you could add in some nuts or coconut milk if you needed the extra calories.
I also make lots of veggie soups and add in some lentils or other legumes if i am really hungry and then blitz the whole thing up so it is smooth. The other thing that I do is to make sure I have something in the freezer for days when I am busy or just can't be bothered to make something fresh. You can freeze juice, smoothies and soups in individual size portions and I defrost them in the fridge.
I do feel better when i eat better but it can be so hard sometimes........I just do the best I can.
I work with a personal trainer 3 times a week and he works with a lot of clients that have multiple health issues so he has been excellent at making accommodations for me when I am in pain. Once a week I work with a physical therapist and she has been working on my neck and skull and I am learning how to relax the muscles I tense when I am in pain.
I also meditate on a daily basis and it has helped me to stay less stressed as I am a worrier by nature.
Sending you a big healing hug.
Trish