Fearful of Compassion

I started practising compassion meditation, and initially it worked very well. Yet, I feel more averse to it than initially, and when I meditate I sometimes experience a kind of distorted facial expression, almost as if I experienced pain. Part of my psychology-related background leads me to think this is either fear of compassion, or even repressed contents surfacing to consciousness. **1) Is there any way to bypass this obstacle to meditation?** **2) Is there anything in Buddhist literature about *fearing/aversion to* compassion?** **3) Is there anything to suggest some memories or karma may surface in meditation, or even simply other inner contents?** Thank you