Problem in accessing my fb page

Today I am facing the issue with my Facebook page. There are a total of 4 administrators of this page. None of them are able to login to the page. My page's link is [You must be registered and logged in to see this link.] It too has more than 11K fans. It all started in the morning today. Is it a technical snag or my page has been hacked? If it is hacked, is there a way I can get my page back. It is very important for our business. Can this technical snag lead to my page getting deleted. I have heard that in most cases the pages are not reinstated. Please someone help me out in this case.

I highly doubt this is related to hacking.

Has it happened with those 3 pages whose links you posted above, or just with 1 of them?

It has happened to all those three pages i mentioned above [You must be registered and logged in to see this link.]