From the BF3 title screen open the battlefeed (on console it's right click the d-pad, not sure about on PC) then it will ask you to log in with your Origin account. Log in with the Origin account, play a couple of rounds and then go to battlelog.battlefield.com and log in with the same Origin account that you logged in with on BF3 and your soldier should show up and you'll be able to use the battlefeed and battlelog.
When I do what you said I only get this message:
"VISIT BATTLELOG.BATTLEFIELD.COM TO ACTIVATE YOUR BATTLE FEED AND EXTEND YOUR EXPERIENCE TO THE WEB"
There is nothing about Origin when I right click on the d-pad a d it keeps telling me to visit battlelog to activate my battle feed.
I still need help
