Hard to say what is going on. You are pretty young and I'm pretty old. Back in the older days lab tests weren't even around too much I don't think.

Anyway, I have a good friend who deals with chronic fatigue for at least 15 yrs and her issues came on in her late 40's or so. I know she takes good dosing of Methyl B12 as do and I've been taking B12 for over 20 yrs given or take. My last lab had my level at 2000, doctor is ok with that. I don't know where a level needs to be for a 22 yr old person. Sorry I can't offer more. Maybe someone else here can offer info on this.