Though the prime advise is to visit a dentist but if in case you are running short of money you can try following home remedies:
use antiseptic mouthwash like listerine daily after meals.
Try flossing your teeth at least once daily before going to bed.
If you are diabetic than take proper medications to keep it under control. Diabetes is no. 2 cause of periodontal diseases
Use soft bristle toothbrush and brush twice daily with proper technique as given in the link...http://www.identalhub.com/article_importance-of-brushing-the-teeth-360.aspx
If you smoke than quite smoke, not abruptly but gradually.
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