Facebook timeline just disappeared.?

[155]

Couple of days ago, I changed my Facebook layout from usual one to the timeline. But now when i open my profile, the layout is back to the usual one and the timeline is gone and i can't get back the timeline as the "get timeline" option is just gone. I don't know why this happened?
How do you re activate it?

[Morgan]

At the top of your page it said... Take a Tour... and you had to go through and at the end it had a button to officially activate it. After 4 days timeline goes away if not activated. Just go to someones page with timeline and get it again and activate it!