my 9 year old daughter has been sick for over a week.  Sore throat, fever of 103, stomach ache, coughing.  Was put on amoxicillin on Thursday for possible strep even though culture came back negative.  Fever went away Thursday night and came back Saturday.  She is very sick.  What could it be?
Hello and welcome to Chat Doctor. Negative culture suggest that it may be viral or allergic condition. Give antiallergic like cetirizine at bedtime. Give paracetamol for pain and fever. Add home remedies like gargles with warm saline (salty)water, honey and ginger tea. Keep your child HY Chat Doctor. Hope this answer is helpful. Good luck.