My female friend has gone over really tough time, but she's emerged as a wonderful, loving person. She now tests as INTJ, too, and I guess it's a natural progression for her. I guess she had great stress from a difficult life situation and she didn't have like-minded friends before, forcing her to act out of character and to withdraw from people. She was very moody, critical, demanding and such.
I'm not sure if those are usual for INTJ in trouble, and if she's best fit type really is INTJ. Nevertheless, she seems much INTJ (very I, slightly/moderately N, moderate to strong T, slightly J) and a great person to love and be loved.