Kindly provide differentials on this case: 15 year old female, cc fever x 3 days, dry swollen lips, dry skin on face, slightly flushed and upper half of the body, generalized weakness & body pains. Starting having elevated bilirubin levels after week 2 of admission, jaundice & continuing fever of unknown origin. This was followed by difficulty of respiration with O2 sats dipping to 84-92% on room air, currently maintained on O2 at 4L/min to maintain 100% sats. No cough, no signs of respiratory infection on imaging studies. An initial diagnosis of Rheumatoid Arthritis was given 2 weeks prior to admission. Rule out SLE, but labs not supportive.