I had a consistent inflow of about 2000+ visitors to my site till yesterday. Google accounted for more than 80% of that all. Yesterday all google serps were gone. Nothing has been changed which might result in this. I had similar experience in Jan also but then serps were back within 24 hours. Now it is almost 2 days. Should I start worrying or is there a chance to get serp's back
this happened to me also 1 week ago and i'm still off Google's SERPS. My site had 7k visitors per day and now im around 200 or less. I didn't SPAM anything, didn't do any black hat seo or aggressive link management and the general guess is that the problem is somewhere within Google. Many webmasters are reporting SERP drops for their sites. old sites with quality content and backlinks. Now, I can't put my finger on anything but you should wait a little. Also, if your site is rather new, it's normal.
I think there has been a change in the SERPS for your keywords. Give it a week or two it might come back. Also have you made any changes to your site?