The best thing to do is to open an EB trouble ticket here: http://www.evenbalance.com/troubleticket/new_ticket.php?game=bf3
And make sure you tell them what programs were running in the background in the last few weeks like fraps, teamspeak, antivirus software, Steam, any overlay program, etc.
The more information you put in your ticket, the better the outcome would be. Always be thorough with your tickets or they will ignore them and only post their normal static responses.