Thank you for your query. Sorry for responding so late.
You mentioned that your son has been coughing for the past couple of days and had stomach infection
. It is quite likely that the infection has increased and causing the symptoms described by you.
It is advised that you child be examined by a doctor and, if necessary, investigated by blood tests to come to a diagnosis and proper management.
I hope I have responded to your query satisfactorily.
Wishing your son a speedy recovery.