For sensitivity use desensitising paste , ultra soft bristles tooth brush and change ur brushing pattern to know what type of the brushing pattern( will be showed by dentist ) and cause for cervical abrasion consult a dentist u will know more details and treatment for it . If even aftr using medication there is no relief the go for a opg .

Hello Use desensitiser paste and mouthwash for sensitivity.and to prevent further progression use ultra soft brush and if u have gastric issue Thn rectify it

Its may b because of aggrasive brushing use soft bristles brushes and start using ventej toothpaste Consult here for further details

It's cervical abrasion of teeth. Tooth has to be either restored with tooth colored restorative material or crown has to be placed. Use soft bristle toothbrush .avoid hard brushing techniques. Use clove sensitive toothpaste to brush your teeth. You can consult through this for further details.