Affiliate Marketing Secrets

Hey all.
I have a niche site with the aim of reaching google first page.
Yesterday I was ranked at #16 for the key words “food lovers fat loss”
My site is http://www.foodloversfatlosshq.com
The site has been up about a month, and this morning after 2 weeks of fluctuating between ranks 20-15 I ‘am now ranked #60 !!?!?
Please help why it has fallen and how to get back on track?
Much appreciated, I mean that! Thanks,