As per your complain, it seems that you are suffering from acute anal fissure, though clinical examination will be appreciated.
Kindly do Sitz bath with lukewarm water 4-5times daily
Apply Anobliss or Escot ointment after every Sitz bath and also before defecation
Continue Syr. Duphalac as stool softener
If pain is very much, you should take oral pain killer for 3-5days.
The problem will take time to improve & you have to be continue the management for 1-2months.
Next Steps
Kindly visit a Proctologist or General Surgeon for better evaluation and management
Health Tips
Have plenty of oral fluids
Fibre rich diet