Why Does She Hurt Me?

I have suffered from depression for most of my life, but have been doing well these past few months.  My mother has moments when, out of no where, she'll be very hurtful. She did it today.  I don't know why.  I never know why, but it hurts.  I'm 42 years old and still I shrink into that insecure child when she get's like this.   Pray for me.  Pray that I won't shrink back into depression over this.  I don't want to go there again. Thank you.