how will i know is this will happen??? Is there anyway i can check how many pure backlinks i got to my site ... like some sort of online tool?? Thanks
You won't know. You can only guess. The Sandbox is just a name given to the process in which google does not rank or new domains highly or even index them sometimes. you can use this tool to check backlinks: http://www.online-utility.org/webmaster/backlink_host_ip_analyzer.jsp
When it comes to backlinks the best tool is Yahoo! (still not perfect though but it gets a lot of the links). for the inbound links to your whole domain type (in the search field): linkdomain:yourdomain.com -domain:yourdomain.com
Don't worry about the "sandbox." Focus your worries on adding good content and building links. As long as you do that, your ranks will improve...