My daughter was taken to ER the Friday before Christmas with a very swollen lymph node. She had no other systems. She was given antibiotic , it went down in a few days, but not away. When returned home she was taken to pediatrician , they took her off antibiotic to see what would happen. The lymph node started to turn red and she had a upper respiratory virus. As of this past Monday, the upper respiratory virus cleared up, but the lymph node turned black & blue. She is very tired and tells us she doesn t feel well, but no other symptoms. Lymph node is now black. What else should we do?