Thanks for writing in.
Darkening of skin is caused by sunexposure and hormonal
weight and MSH stimulation can cause darkening of skin.
Chemical peeling can give you fast and long
.They are available at dermatology clinics.
Apply cosglo cream at night.Take vitamin C supplements.
Or you can continue the treatment given to you.It is also correct.
You can use gel based sunscreen like Zoray acquagel sunscreen.It wont make you look dark.
Hope this helps.