I started a new blog 2 days back and submitted sitemap.My newblog has 2 posts but still its not indexed in google how many days will it take to get indexed in google.
Some sites are indexed faster than other sites you should continue to build backlinks and your site will be indexed soon.
Maybe you have to wait for around one week, and there is no specified days which means how long your page will be indexed, but normally it shall be from 3 to 30 days.
If you are using an RSS feed for your new blog, submit them through a ping site and your site should get crawled in the same day. Build your backlinks and add fresh content and the bots will come through your site more frequently.