You definitely have mitigating circumstances and that makes it hard. Having different diagnoses simultaneously can be difficult to navigate what's responsible for what. It's great that you have some improvement and are making progress with your functional medical provider. Stick with it as that is where your gut brought you in the first place, right? As far as B-12, give it time and stay the course.

Do you journal? It's not for everyone, but sure can help get swirling thoughts out of your head and onto paper. It's a good way to release emotional stress. Of course as with most things, moderation is key. Writing down thoughts of fear, frustration or worry should be time limited. One tip is to set aside 10 -20 minutes each day to journal, preferably mid-day. It's helped me through the my journey. What do you think? Think it could help?