About my Hypgigmentation

Here’s my situation: My ethnicity - I am female of Cuban and Lebanese decent. My Problem is I have developed Hyperpigmentation over my lip, chin and bridge of my nose. The suggested prescribed remedy was an 8% hydroquinone cream, which I was applying before bed time. After a 4 week period, I haven’t noticed any changes in my hyperpigmentation. Is there any Doctor out there who can remedy my situation?