Yes Im A 36 Y/o F I Have Multiple Symptoms

yes im a 36 y/o F i have multiple symptoms of hypothyroidism, loss of hair, premature gray, fatigue, memory loss, slight depression. Weight gain even with diet an exercise, dark whiskers growing on chin. All the women in my family have hypothyroidism and are treated, I have more symptom then any of them. I've been tested multiple times by different doctors, all say no problem lab value normal. Value of last test Free thyroxine 1.0 TSH 2.24. Was told had low B12 and low Vit D treated for both B12 now normal but vit D still low after 2 years of treatment. Any thoughts?