Google has dropped my rank organically the last week

Hi everyone, I'm in a very niche market in webdesign and with the search term for our specialty we've always had number 1 or 2 placement organically on google the last 3-4 years.
The last few days my phone hasn't been ringing as much so I checked my placement and I've fallen to 5th on pg 1 and almost onto the second page, and now my competitors who were non existent before are above me, can anyone shed light on why this might be? I just need some help.
Never did any kind of SEO campaigning…
Google has dropped my rank organically the last week

See original post by joomlarocks