Lost my mom and am completely lost

My mom passed away on 8/9, with pneumonia and sepsis. I still can't believe she's gone. She was my best friend, my rock, my everything. I'm an only child and in this moment I wish I had siblings, someone that could understand what I'm going through. I feel like there's a void in my chest, I can't sleep, I can't breathe. My mom lived in Brazil, and when she was hospitalized I flew there the day after, I was able to see her awake for 2 days, then she was intubated and never awoke. She was 66, I'm 38. I'm feeling so much pain and guilt. My strength has been my daughters