Welcome to HealthcareMagic forum.
Yes it doesn't seem that that the high fever
is related to the fall rather it could most probably due to respiratory infection ( cold flu).
However if the temperature persists after 48 hours or worsens ( >102F) , then it would be best to get him evaluated by his doctor and confirm the diagnosis so that appropriate treatment can be started.
As of now antipyretic
can be continued .
Watch for signs like vomiting
, postural imbalances , or weakness of limbs or any seizures and if any such symptom noticed then it's best to visit the emergency facilities and get a CT scan
of brain done .
As of now it doesn't seem worrisome.
Hope I have answered your query.
Wishing your child good health.