Yes, about a year and a half ago I had some mental healing that was unexpected, though very welcome. 
A year or more before that happened, I lost a beloved pet and blamed my husband for allowing that to happen.  I was very angry with him and held my anger by shutting him out of my life in several ways.  I do not recall asking God to help me with this situation, except that I had acknowledged to God that I knew I needed to be kinder to my husband. 
The healing experience happened in the middle of the night one night while I was half asleep.  All of a sudden I felt a sensation of just letting all the anger go and a peacefulness taking its place.  I really don't believe that I had taken any sustained action (such as prayer or "believing") to cause this.  The anger never returned.  I do believe this event was God working in my life, just in an unexpected and unrequested way.