Welcome to HCM,
After going through your history first we should be sure of condition this yellowness is not due to Jaundice with high bilirubin
and Severe Anemia causes pallor,Hypothyroid,Diabetes
so please visit a Physician and get examined and investigated for Complete Blood count
and Liver function Test,Urine R&M,Renal Function test and if any skin issues examination by a Dermatologist
If there is any abnormality it should be treated accordingly.
This Carotenaemia occurs in vegetarian and young age (Children)
Beta Carotenaemia is benign and not much treatment is required and color to disappear may take months, once intake of excess of carotene is stopped