I have starter a blog back in January 2012 - Infworm.com, I have worked a lot on it and had posted daily content and got quality backlinks. Everything was working fine. I had a Pagerank of 1, thousands of daily visitors and I have around 600-700 pages out of which around 500+ were indexed in Google. But due to some problems, I had to switch my website to a new hosting service, keeping the domain name provider same.
I changed the nameservers to the new ones and transferred the site completely. Once that was done, I was shown an error in webmaster tools that Google couldn't crawl my site, so I deleted my sitemap and re-submitted it. That was the day, until now it hasn't been yet indexed in Google and my rank is dropping day by day. Please help, I am not even getting the reason for this problem!!!