What Causes The Symptoms Of Light Headedness, Chilling In Blood And Night Sweats?

Hi. I am 21 years old and I have been experiencing 5 month-long and often spontaneous symptoms that are debilitating. I had lost 25 lbs. in roughly 2 months (no more exercise than normal), dull and aching muscles / joints, light-headedness, ice-cold feeling in blood, barely any digestion (BM barely once per day), night-time sweats and violent thrashing from side to side in the early morning, and some minor memory loss / mental dullness. I also had experienced a temporary cough and wheezing stage and now I still sometimes feel short of breath. I have already experienced enough testing to rule out infection / cancer etc. (abdomen + chest CT, blood-work, etc.) The only thing that was noticed was high C-reactive protein at about 15 mg / L in October. I don t know what to make of this other than an auto-immune or auto-inflammatory disorder.