Seo happens not in a day, be patient, keep quality content and don't be to spammy with backlinks Good luck!
Hello, Your site is index with 4 pages, so don't worry. Do quality work ranking will come again. Thanks
A site needs to make may negative things to get de-indexed. So you probably got un-ranked. it happens.
Patience is key. Don't look into it too much, or it will drive you crazy. Focus on other methods of traffic such as article syndication, forum posting, blog commenting, etc. Don't rely completely on the search engines as they can change at any time. Jake