Grief of moving forward- what’s new normal

I lost my mom suddenly 4.5 years ago. I was very very close to her. I think I am still grieving and living with new skewed new normal. Someone’s mom died today and I was at loss of words. I can never forget what I went through but I feel guilty and bad that I couldn’t find right words to comfort someone when I have gravely experienced this situation. Is this normal to feel?