Hello ma'am.
You have mentioned that there is generalized enamel wear out ( attrition in dental term).
Wearing a night guard, avoiding acidic and hard food, and using remineralizing or fluoridated toothpaste will only prevent the situation from getting worsen. It, in no way, will restore the lost enamel, or regain the tooth structure. Enamel is the only hard tissue in the body that cannot be regrown.
Next Steps
you can visit the nearby dentist and get a thorough checkup done. and if the attrition is a,major concern to you, you can get a prosthesis done (either crowns for the back teeth only, or a full mouth rehabilitation).
Health Tips
advice is strictly based on the information that you provided. a thorough clinical examination, and a few,x-rays will be required for a specific and comprehensive treatment plan.