Kim Kardashian returned to Los Angeles Sunday night at 11 pm after visiting her estranged husband Kris Humphries in his home state of Minnesota.

The reality show star, who filed for divorce just six days ago -- 72 days after she was married to Kris in a lavish, made-for-TV wedding -- is reportedly reconsidering her decision.

Kim arrived solo, without any of the family members who usually accompany her everywhere. She was extremely somber and looked depressed.

But the most telling sign about where Kim's head and heart are right now? Her $2 million wedding ring is still OFF.