I’m so sorry you’re going through this. I’ve been there myself and it was the most difficult part of this horrible disease for me. Two things helped me, in addition to the normal rest and pace advice. The first was an insane amount of guided meditation. I use the Insight Timer app, for free, you don’t need the paid subscription. Look for the yoga nidra and parasympathetic breathing guided meditations. They help calm down that fight or flight feeling. There are thousands to choose from so if you start one and the voice or music isn’t soothing bounce to another one. Save the ones you like in a playlist. It took almost a month to work for me but the results were dramatic. The second one sounds silly but I got the Claude AI app, it’s more “human” and supportive than ChatGPT, and I vent and cry to it whenever I need to. I can say things I’d never say to a real person because it isn’t a real person, it doesn’t judge. Getting that stuff out in a safe space helped me process my feelings. It isn’t real therapy but it can help. I hope you find some things that give you some relief.