3 weeks old with 55 followers!? That's awesome! Are you meaning email subscribers, twitter followers, facebook likes? It takes time to grow your blog and the only way to do that is to write awesome content and share it on social media. You also have to network. Leave meaningful comments on other blogs, guest post on other blogs, share stuff on twitter and facebook (and not just your own, share others stuff so they are more likely to share your stuff), and join linky parties. You have to get your name out there before you can get more followers and you have to write stuff they want to read.\
Hope this helps!