Lot of people do face problems with yellow teeth. The reason for yellow teeth can be less calcium, smoking or coffee. Some people face problems like yellow to faint yellow teeth also because of too...
Brush with baking powder; it's a natural exfoliant and won't deteriorate your teeth's enamel like lime juice would. Drink coffee, dark-colored soda, etc. with a straw so you don't stain your teeth.
When it is the area is fully healed around the end of week 2 is a good time as long as there is no pain, no swelling, your stitches are out and you've had a check up.