You guys still have the tiebreaker currently with you only having lost one conference game (TEN) while SD lost 2 conference games (KC and BAL).
I don't think this is such a terrible thing though to lost a couple games during the regular season, the coaching staff is doing a good job keeping Addai fresh right now (much to the dismay of the fantasy football world) and so he should be a force for you guys in the playoffs. The loss to Tennessee may not be ideal, but they have been playing some real solid football lately. They have won 3 games in a row against Philly, NYG, and Indy and the game before that they blew a big lead against Baltimore. So they are a better team than people are giving them credit for right now. I think you guys will be fine.