Benzoyl peroxide bleached my face?!?!?

My dermatologist gave me Benzoyl peroxide wash to stop my acne. He also gave me differin and clindamycin phosphate. I was using it, but then i started seeing my face getting whiter. Now, i have white blotches by my jawline. Should i keep using it? how do i even out my skin color? it's similar to sun spots. please help!!!