Omg I had the exact same symptoms with 103.7 fever ...... Went to ER ..... They found nothing.... I couldn't breathe either ..... Tons of chest and shoulder pain ...... They did CT, upper gi and X-rays ..... They did bw and found my lipase was up and potassium was down... Got 5 bags of kcl and fluids.... They did start heparin injections... They said I was dehydrated but doesn't explain fever and chest/shoulder pain... I was sleved aug 16 .... Readmitted on the 27th for 3 days ... Scared of get dehydrated again since I'm drinking all I can and thought I was doing god w fluids before that happened