Site disappeared from Google

There is nothing to be worry yet, it's a dance. It's natural with new domain. However, Indexer option in GSA SER is not good for a new site. It creates lot of links from the same domain which may cause red flag. Instead of doing those, you can build few high PR web2.0s and then build links to those Web2.0s.

maybe you've meet a google update.
i see that if one keyword disappear for couple days then it appears as ranked