A dentist told me to use Sensoform Gum Paint. I used it 3 to 4 times a day. I started noticing my teeth turning yellow. I initially thought it was because of gum paint which was also yellow in colour. But later I stopped using Gum Paint. But my teeth are still yellow. All my teeth have turned yellow. The dentist has told me to use Floride toothpaste. Can someone please assist me? I'm very stressed about this.