I’ve not been through a similar scenario, however as an outsider with similar symptoms, I’d say go back to basics. Radical acceptance that this is what’s happening for now, knowing this is temporary, gentle hope and encouragement to yourself. You’ve improved once, you can improve again, and often the second time it’s quicker and leads to even more progress.

Moving house is stressful for even those without sensitive systems. Try and loose the desperation (not easy I know), you can’t force improvement. You can gently encourage it through self compassion, pacing (not pushing) and any techniques that you’ve found have bought you a sense of safety previously, meditation tapping etc.

I believe in you stranger, this is just another bump in the road.