Could it be vitamin B12?

Doctors say; “It’s all in your head,  if you eat healthy you can not be deficient", but you're never well. Low B12 can cause chronic fatigue, infections, FND, MS, SCD, burnout, MUPS, morning sickness, infertility,  Long Covid, anxiety, depression, dementia, autism, ADHD, bipolar, suicide, and other neurological and psychiatric disorders, including PPD and PPP, MHBP and elevated PAP smear— it's an epidemic of misdiagnoses. Blood levels can be “within range”, but on cellular level it's too low but that's not measured.
Mothers in pregnancy may be deficient, and breast milk low in B12, putting her baby at risk of failure to thrive (FTT), and together with a low in vitamin D, iodine and iron can cause developmental delay. 
You may actually be on B12, but recieve too little, iron, NSAID's or psyciatric meds, you tried thousands of expensive treatments and supplements, eat keto, or carnivore, but still suffer. 
You can talk to me online and untangle all your symptoms, could it be B12?