suddenly my website trafficc dropped 90%

[apexis]

suddenly my website trafficc dropped 90%
i have recently make an site and there was a 1500 page view and 800 unique visitor coming everyday with out any SEO. but suddenly my website traffic to 40 page view and 10 unique visitor. i have not made any changes on site how the traffic 90% fall down ? i don't know. can anybody guide me or anybody face similar problem to suddenly fall down internet traffic ?