Hi no need to panic. First step will be a get a routine scaling done. See if the swelling and bleeding stops. If it still doesn't stop after a week or so. Get deep scaling done. It should ve done by a periodontist for best results.
Next Steps
Rinse your mouth with lukewarm water and salt. Twice a day.
Health Tips
Make sure deep scaling is done done by a periodontist. Treatment done sooner the better don't delay for a long time.