Help!Help!Help! Please come in, SEO experts.

These days are a bad time for me. The rank of our website dispeared from google index. Our website has been built for about 3 months. With our efforts, one of our keywords- "GHD" has ranked at the ninth of google index. Yesterday morning we can't find our website in the index of google. At first, we think our website by Google Trichotillomania. However, The number of sites included and backlinks don't change. Today the number began to reduce. And I found that there are no index included in the sites included. Who can help me? I am not here to advertise, I am really worried about our website. Please don't remove my post. I want to let more seo experts help me.