Sixteen Year Old Probably With Low Grademfever For A Wek,

Sixteen year old probably with low grademfever for a wek, then enlarged lymp node, swelling neck, fever 101 for 3 days. Sore throat, earache, threw up. Doc pit on an antibiotic, but she broke out in hives then switched to bavtrin. Dehydrated. No better after 6 days. Rehydrated in er twice. Pussy tonsils. Quick tests for strep and mono negative. Joints now swollen. On tylenol, benadry and some for queziness ( mot working when she moves around). Been to doc 4 consectuive days. Any advice? Fever gone.