Hair still thinning in the temples but success in the Crown???

[Nexus6]

Hello guys! I will not say that I am new to the forum because I have read this site incessantly in recent weeks. My case is this: I believe I'm still an NW1 at least to other people's eyes hahaha (I'll try to post photos) but I've always noticed a spot in the crown area. I decided to take Finasteride 1mg. I have been taking it for 4 months and have already noticed a very satisfactory result in the crown area (I don't have pictures of it before starting Fin ). BUT in the area that has that triangular shape in the temples I notice the hair still thinning (Under proper lighting I see several thin blond strands between the normal ones) more on the right side than the left. I'm sure it was not that thin before I started taking it! I wonder if it is normal with 4 months of Finasteride I still see the hair thinning. It is too early? Should I wait or increase the dose? If it has already had an effect on the back then why the temples only get worse? Is there a chance my temple hair will get thick again?

Sorry for my bad english! Posting from Brazil.