HELP! Should I continue using this?

Ive been using neutrogeana oil-free acne wash in grape fruit for a week and it gives me white flakes on my face. i wonder if it's just my skin or i should stop using it. im getting more acne but maybe it's just coming up so it can clear it out or maybe it just won't work. please help!(: also my skin is very sensitive and i don't want it to damage it anymore then it already is (very red and gets irritated easy) Thanks!!