Girls, sometimes my daughter starts crying at night and doesn't wake u…

Girls, sometimes my daughter starts crying at night and doesn't wake up, I pick her up and to calm her down sometimes you have to wake her right up, but waking her up is kind of hard, I say to her, hug her, but it's hard to wake her up. Has anyone had this happen? What could be related to it? Can we develop new products? Although what she gave me was just a teaspoon. I don't even want to do anything after such nights with tears. Then she calms down when she wakes up and may ask for breastfeed again and then sleep, but it's not nice to me ?