It is very common for ladies to have clogged pores in the lower face, especially near the time of the month. A regular exfoliation and oil control regime should be sufficient to control what you described. Differin applied properly (for example, only at night) should have good effects, if not you can also consider an increased concentration. Additionally, there are some other skincare products like BHAs you can use in the day.
Additionally, you may consider seeing a doctor to check if you have diagnosed your own condition accurately. Some other types of facial growths could mimic stubborn whiteheads. Your doctor may also suggest some medical treatments with medi-facials, chemical peels or lasers to improve your condition.
Hope this helps!
