Perhaps you are feelings as if you are taking on more of an authority figure role in life as of late. Realizing that you have more hair (as mentioned, and in places that you had not noticed)...may also point to the fact that you are taking on responsibility (decision making or becoming more authoritative), in areas of life (yours or others close to you) than you have previously realized.
In a manner of speaking, this happens when someone is not stepping up to the plate and the we take charge and finally realize that it is a role that has taken us over (not one that we had consciously decided to take on).
regards,
sailrmc