I grow alot of dark hairs on my chin. I pluck those hairs on a regular basis! If I didn't I'd have a beard! I also bleach my upper lip! I do that other wise I look like I have a mustache! It is hard being a women,sometimes!
I wax, and pluck in between. I don't bleach at all. It could be evidence though of a hormone issue. You may want to check with your doctor just to make sure everything female is going ok.