Maybe Undiagnosed or misdiagnosed. Me)

Since 7-8 months I always feel fatigue and a feeling of something stuck in left side of neck. I have Gastrointestinal issues like indigestion and loose stool. I went to several Doctors E.N.T( 2 dr.) , General Physician (3 dr..) , Gastroentrlogist and did all sort of test - CBC(4times), Thyroid, PA view Xray, USG, LFT(2times), Renal test, BUN, TLC(3 times), Chromatogram, Throat culture (2times), HIV 1&2, malaria test, typhoid test, Antibody test , widal test, ESR, RBC count, Hepatitis A,B test, GI Endoscopy (2 times). Everything came back normal only Vit D defeciency found and H pylori. But I feel something sinister is going on(god forbid). I was given medicine but I didn't get releif, my symptoms are - 1. Sudden chills (goosebumps) 2. Extreme fatigue and depression. 3. Left side throat pain along with ear and feeling of something stuck(although ENT didn't find anything) My query is can Vit d defeciency or H.Pylori cause these symptoms or something else( Dr. Google is killing me)