The symptoms what you mention clearly point towards infection of gums and bone which in layman's term is called pyorrhea and in technical terms called periodontitis.
Next Steps
You should immediately visit a periodontist (gum specialist).
Xray of teeth for full mouth has to be taken and laser or bone grafting procedure has to be done depending on severity of the condition.
Health Tips
Brush twice daily visit dentist every 3-6month s.