rogaine regrowth

[reacttome]

Hello. I have been using rogaine for almost one month on my temples and front of my hair. When I look for regrowth I see thin light hairs but it is my understanding that when you lose your hair that is also what happens (hair minimizes and become smaller.) So I was wondering how can I tell if this is regrowth, thickening of my existing hair or am I still just losing hair.
BTW this is a great site.
Thanks