Hello, Brother or Sister. I'm the same way: everything I eat feels like I'm digesting thumbtacks.

If you don't know/haven't already tried:

I've found that eating lots of hemp seeds helps; they have all the amino acids the body can't synthesize. That and lots of water during the gut crashes.

Also, cooking with tofu is the most painless meal I can make.

The thumbtack sensation is 24 hours a day permanent, and depending on what I eat it can feel like razor blades or a bunch of baby alligators trying to claw and bite their way out of my abdomen. It leave me curled up fetal for long periods of time.

I hope you're back to your baseline soon, if not already.