thanks for your query at HCM
your complaining of throat pain, cough
, weakness and fever
it could be viral infection
1 there is no need for antibiotics for viral infection.
2 cough syrup your taking is ok .
3 you can take crocin
three times a day if fever is present.
4 take plenty of water that will decrease throat irritation
and decrease cough.
5 do betadine
gargle three times a day,
6 tab sianrest three times a day
if fever is not controlled on crocin, or high grade fever, fever more that three days you can start on antibiotics
hope this will help you