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Discontinue the use of peroxide type mouthwash, use a gum paint which could strengthen your gums. Gums may move a little downward after cleaning as the inflamed gums come back to normal size after cleaning and is normal.
However, in the photograph (attachment removed to protect patient identity), it looks like you still have inflamed gums and a consultation with a periodontist is recommended at this time.
The probable causes of inflammation may be an injury during the procedure or incomplete removal of deposits or the use of peroxide-based mouthwash.
Your gum specialist may do a thorough checkup and will be able to tell you if you require another round of cleaning.
For more information consult a dentist online --> https://www.icliniq.com/ask-a-doctor-online/dentist