If you can get it, try use some Biomin F toothpaste for a good few weeks. I've got exposed parts of lower teeth too due to over brushing. This toothpaste goes a

If you can get it, try use some Biomin F toothpaste for a good few weeks. I've got exposed parts of lower teeth too due to over brushing. This toothpaste goes a looong way to reducing sensitivity to near zero levels.