Hi Doctor!

For the past week, I have been getting intermittent fever (never more than 99 deg). Two days back i felt a warm sensation with dull pain on the left leg and arm with a tingling feeling in the fingers of my left hand.
Today my fever is low, but i have a dull headache throughout the day and a metallic taste in my mouth. The metallic taste is new and i dont remember ever having it. Should I be concerned? I am a 32 year old male who was also diagnosed with vitamin d3 deficiency a month back ( count was 17).
My family history has neurological problems. My father is an ALS patient and has been suffering for 4 years and 2 months. His father (my grandfather) had either alzheimers or something similar but only after the age of 74. He died at 92.