Do not take antibiotics in early stage. I think u feel nauseous or retching. antibotics and syrup r for tracheal infection which comes from ur throat in late stage.
in dry season, avoid spicy food. when u just feel uncomfortable in throat, start the medicine for pharyngitis, u can also take them now.
Also, for pharyngitis, it will take time to recover because it's one of the difficult place medicine works on.
Now, as i said, u can
1. take medicines for pharyngitis
2. avoid spicy food
3. use steam before sleep, inhale warm/hot steam deeply

hope u recover soon.