Hello! I am 27 y/o male. I feel weakness and fatigue. I get tired easily. I can not sleep properly at night and feel a little dizzy throughout the day. (Dizziness is not extreme that I will fall down). There's no headache or vomiting sensation. When I workout, I get tired easily and heartbeat goes up very soon. Sometimes there is jerky feeling in back of head. I recently did blood test, there is Vitamin d deficiency. Rest cbc report is normal. Vitamin d - 10 ng/ml Vitamin b12 - 464 pg/ml Hemoglobin - 16.4 BP - 135/73 Fasting Blood sugar - 77. 9 mg/dl Can these symptoms be related to vit D deficiency or poor sleep? Please advice. Thanks.