http://en.wikipedia.org/wiki/Finasteride
Read the chapter 'Hair Loss'.
Get a prescription from your dermatologist for Proscar (not Propecia because it is very expensive) or a generic of Proscar to save even more money.
This should cost you 60-75 Euros for 500(!) days.
After this post I feel like some kind of spammer. 
P.S.
Finasteride works only if you'll take it as early as possible, which seems to be the case for you. And its impact is more prophylactic than anything else. If you will wait a couple of years and have lost a good portion of your hair it will be to late and it will NOT come back through Finasteride.
Tempus fugit Nintendo manet.
Level 1 - Newbie
Level 2 - Member - Pass 1k
Level 3 - Regular - Pass 2k
Level 4 - Addicted - Pass 5k
Level 5 - Obsessed - Pass 10k
Level 6 - Old Guard - Pass 20k
Level 7 - Legend - Pass 50k
Level 8 - Demi-God - Pass 100k
Level 9 - God - Pass 250k
Level 10 - Zeus - Pass 500k
New Table:
Level 1 - Newbie
Level 2 - Rookie - Pass 1k
Level 3 - Padawan - Pass 10k
Level 4 - Sea Dog - Pass 25k
Level 5 - Captain - Pass 50k
Level 6 - Agent - Pass 100k
Level 7 - Elite - Pass 175k
Level 8 - Hero - Pass 250k
Level 9 - Legend - Pass 500k
Level 10 - Titan - Pass 1 Million
