Grieving with children

Hello ladies
3 weeks ago my sister committed suicide and my life has just been so empty since nothing feels the same and the amount I miss her is unbearable.. I don't feel as though I need counselling but i have 2 girls aged 3 and 4 and sometimes I feel my eldest pushes my buttons to the point I'm taking some of my emotions out on her I'm just looking for ways to stop this and get our relationship back to normal?
Does anybody have a good psychic/medium? Melbourne area.. I really need to find out that she's ok and that wherever she is she's happy