Put a tiny bit of toothpaste into a small cup, mix in one teaspoon baking soda plus one teaspoon of hydrogen peroxide, and half a teaspoon water. Thoroughly mix then brush your teeth for two minutes. Remember to do it once a week until you have reached the results you want. Once your teeth are good and white, limit yourself to using the whitening treatment once every month or two.
NEWSFLASH: you are definitely wearing the wrong size bra. I've known this info for ages, and it really is life altering. This woman puts it all in one place in a no BS guide. You need to read this if you have breasts. I do not like bra shopping.