I have a nice life now, but I feel like everyone's so vicious and mean to me in my dreams.

I used to have a terrible relationship with mom, back then my dreams of her were delightful and inviting. Now I have a good relationship with her and now my dreams of her are frightening. Dreams of her moving me back to a place I don't want to be, dreams of her yelling and screaming at me like she used to. I don't know why I'm having these nightmares. I wonder if it could be that I'm still holding on to resentment towards her, but I don't feel any, At least I don't think I do. 

This also happens to me with other people such as my brothers, sisters and even some friends. 

My night mood medication doesn't seem to be working anymore; they used to prevent my nightmares but now I sort of dread going to sleep. 

If anyone knows any kind of psychology on this matter let me know. 

Thanks for letting me share. Good luck :)