Please avoid using mouth wash more than a week. This makes entry of other disease easy by weakening normal immune response. This also leads to discoloration,oral ulcers ,change in taste or even to oral cancer.
Hydrogen peroxide should be used with caution. It burns your soft tissues.
Next Steps
The normal shade of tooth is yellowish white.
Complete the scaling procedure.
Further, if you need to make more whiter, go for Bleaching or whitening procedure from Dentist
Health Tips
Brush twice a day, especially at night to see differences in shades. Use pepsodent/ Colgate which is better than others.
Hope this helps you sir .