Hi Lisa,
Thank you for your question! It is very good that you are taking such care to prevent sun exposure. However, the combination of microdermabrasion and Retin-A and the fade cream may not be optimal. Retin-A cause your skin to be thinner than normal, and microdermabrasion is causing further irritation to the thin skin. On top of that, the fade cream is reducing the pigmentation in your face and causing lighter skin color. Discontinuing the fade cream may help to return some of the color to your face. Retin-A is not known to cause facial discoloration. In regards to the sun sensitivity, several weeks after you stop the Retin-A treatments, your skin should be back to normal and you can use less caution when going into the sun. Be sure to discuss with your doctor how long you should continue using sunscreen and hats after stopping the treatments.
Best of luck,
Casey