Constant High Fever that won’t break

Patient: My 8yr old daughter was diagnosed with strep throat about 12 days ago, we have tried 3 different antibiotics to get rid of it and it is still enflamed like the first day. She keeps getting fevers of 103-104 then they fall to 100.2 then go back up again. She is very pale and has not eaten very much besides fruit in the past 12 days. Her nose is very stuffed but runny and she also has a cough.Yesterday we took her for blood work as a doctor wanted to test her for mono. I have no idea what to do now, her fevers are concerning me and the fact it has been so many days and no sign of improvement.