Hi...first of all no need to worry.The pain and sweling is common after post extraction.Take medications properly as prescribed by ur dentist.Avoid eating in the extracted side and take soft diet for 1 week.Never do force gargling and irritate that area with tongue.
Next Steps
If the pain is more visit ur dentist immediately so that they could increase the dosage of the medication.
Health Tips
Advised to do regular dental check up and teeth cleaning every 6 months.