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I am very very worried as my organic traffic suddenly came to pretty much a halt last Friday. We have been working very hard on content in the last 2 years and have 0 duplicated content with many  thousand travel guides, tips and other travel related info. We are also publishing a successful travel blog which used to get quite a bit off traffic. Everything stalled last Friday and since we are operating in the travel industry which is very competitive, this will be very hard on us. In fact, I fear that we will not survive this drop for more than 2-3 months. How do we find out about what happened and what can we do to get our SERPs back? Thanks!