High I'm 46 Yr Old Female. Last 2 MCVs 103.3.

High I'm 46 yr old female. Last 2 MCVs 103.3. B12 level 576. I have been Dx with RA and Serogren Syndrome. Autoimmune Diseases. Symptoms are present. Fatique on top of the list. Ramdom coughing and sob. No history of hypertension or diabetes. Full hysterectomy and cholecystectomy 2002. The rest of CBC normal. I do B12 shots once a month.
Can mold cause my body to feel so horrible. We have this issue at work. All was good until I started the new job 1 year ago. Desperate to figure out so I can feel like me again.