The bone swallowed 3 months back can not be attributed as a cause for throat pain now.
The symptoms as mentioned in your post indicate that you might be having Pharyngitis
1. Gargle with warm salt water to relieve throat pain.
2. Analgesics like paracetamol
3. Antibiotics depending upon culture & sensitivity reports to remove the causative organism.
4. Antihistamine preparations can also be used to provide symptomatic relief.
If symptoms still persist...it will be better to consult an ENT specialist
Meanwhile...avoid taking cold
food & drinks, maintain adequate hydration & take soft, non-spicy foods.
Wish you good health & a speedy recovery.
Thanks & take care.