Reply To: Hi. I'm 23 years old. For the past month, I have been feeling sick. I went to the doctor two weeks ago and had a blood test done and it came back with deficient vitamin d levels @ 15. The doc gave me supplements but there is one symptom that I don't see other individuals have and that is irregular chills and a feeling that my body is constantly warm. But every time I check my temperature it is normal. Could I have an auto immune disease that I don't know about? The rest of the my blood report checked out just fine.