Thanks for writing your query.
After reading your post, it seems that your child is having viral fever
. which should subside by its own.
can be given as adviced by your doctor to reduce the fever and decrease the discomfort felt due to the fever.
If the fever is still is persisting, you should get following investigations done :-
1. Complete Blood Count
2. Liver Function Test (LFT)
5. Urine (Routine and Microscopic)
Medicines can be added, if needed according to the reports.
Regarding your daughter, you can give her antiallergy medicines after getting her examined by a Paeditrician.
I hope this is helpful to you.