For protein, you might consider plant-based protein. There are protein supplements, typically based on Pea Protein these days. It was based on soy in the past. Rob's Red Mill makes protein powders that you can use for shakes or baking.
I'm using lotion on my hands myself as my fingertips are very dry. The objective evidence that I have of this is that my iPhone doesn't recognize my fingerprint when I go to unlock it.
I'd also suggest core work. This might help with bathroom issues overall and decrease injury risk.
You are actually on the other side of treatment - it's a pretty rough road to get to where you are now.
I will look into the more plant based protein powders. I am still too low on calories since now I can't seem to go to the bathroom so I'm unsure what to eat. I mostly skip breakfast, eat lunch and maybe a snack of fruit later then skip dinner. Yesterday I took milk of magnesia which I wasn't sure was a good idea but nothing else has been working for me. It's so weird to go from one extreme to the other. I've lost 2 more pounds and I know I need to eat more. I just dread going to the bathroom and don't want to eat.
It's raining here today, maybe that will help with the dry weather a little bit. Keep using the lotion and hopefully your hands will recover. And of course drink extra water as that is supposed to help, too. It's hard to drink a lot of water when it's so cold out. It makes me freezing even at room temperature since it's chilly all around.
What kind of core work do you suggest? I know that will help with everything and I need to be doing more than just walking.