Facebook error/bug pissing me off?

[gamefreak]

Hey!
I have had a really irritating error from facebook for two weeks straight.
So hear me out please.

Alright, I once got a message from facebook that I need to secure my account. So, I changed my password. The strange thing was it was stuck in a "Secure your account" loop.
It was asking me to change the password time and again. Kinda like if I change the password, the error pops up like

"Sorry, something went wrong. We're working on getting this fixed as soon as we can."

So, what I try to do is refresh or hit "Go back" below the error message. Again, it asks me to set a new password. This is really pissing me off.

I had this error since two weeks, but despite the errors, I was able to log in to my account after several refreshes and repeated log in and log out.

But, today, facebook is not allowing me.

And also I got this feature in facebook activated that asks me to save my computer.

WHAT THE HELL IS THIS PROBLEM? IT'S DRIVING ME CRAZY. PLEASE, SOMEONE HELP ME.

P.S. It's working just damn fine for my friends.
EDIT 1:
@Vlar: Yes to all. I have done all. But this is driving me so crazy. I don't know what to do.
This new error is shown now:

Facebook Will Be Back Soon

Facebook is down for required maintenance right now, but you should be able to get back on within a few minutes. In the meantime, read more about why you're seeing this message. Thanks for your patience as we improve the site.

PLEASE, FOR THE LOVE OF GOD, MARK, YOUR COMPANY IS KILLIN' ME.

[Vlar]

Have you tried to login on another PC?

Did you check that you are using http://www.facebook.com with no typos?

Have you tried the FB forgotten password option?

Have you looked at the FB help pages?