Pigmentation on Forehead & cheeks.

My name is R.Praveen,I have been suffering from pigmentation on my cheeks & forehead. In 2014,I met a Skin doctor.He preferred me a cream called "clearz ultra Max" which contains hydroquinone.I used it in night times & wash it after 1 hour before sleep as per my doctor's advise...I used often for 1 month.But I didn't see any difference on my skin..After that I discontinue that Again in 2017,I met a top doctor in chennai.she preferred me a two creams 1) L-skin 2) HQ-One She suggested me to mix both and apply it on skin before going to sleep I done it regularly as per her advise,but again there are no results on my pigmentation skin I used above all medicines based on dermotologist doctor's suggestion only.But I didn't see any effective results on my skin I underwent for "chemical peeling" too,but I didn't see any results..can you Please suggest me better ways to reduce my Pigmentation and make my skin whitening