Since you have been to a dentist already, I trust he/she must have adviced you correctly.
But, to help you further, a few things you need to take care is-
1. Brushing time. Don’t brush for more than 2 minutes
2. Pressure while brushing- don’t apply too much pressure on teeth while brushing.
3. Brushing technique- try vertical method of brush, and circular motions instead of horizontal grinding on teeth.
4. Kindly stay patient with the toothpaste. It needs time to show effect.
5. Ask your dentist about dental-crowns if your teeth are suitable for them.
Next Steps
We can schedule a consultation if you need second opinion.