question: a FRIEND RECENTLY HAD A ROOT CANAL DUE TO AN ABCESSED TOOTH. sEVERE NAUSEA AND DIZZINESS HAVE PLAGUED HER FOR THE PAST 3 WEEKS. A BOUT OF ANTIBIOTICS AFTER THE FACT , AFTER BEING HOSPITILIZED, AND NOW AGAIN IN THE HOSPITAL DUE TO THE SAME WITH A FEVER. NO ANSWERS FROM THE HOSPITAL DOCTORS AND TESTS. HELP!