Death Eaten: Draco Malfoy X Reader

The Dementors

We were getting on the Hogwarts Express. I was planning to sit next to Tommy and his friends. While walking past the compartments, I heard people whispering "I wonder what trouble the golden trio and their pet snake will get into this year."
"Hmm...pet snake, huh?" I said to Ethan who was walking beside me.
"Just ignore them," Ethan said as we continued walking. 
 Is that what they really think of me?  A pet snake? Well, things are definitely going to change this year for me, no doubt. 

I finally found the compartment where Tommy, Cedric, Will, and Deedee were. 
"Hello, love," Tommy got up and went to hug me. I had Shadow in my arms, so it was an awkward side-hug. I took a seat between Stephan and Tommy. 
"So did you hear about Sirius Black? Escaped from Askaban, he did," Will said, showing off a newspaper with Sirius Black screaming and laughing maniacally. 
"I wonder how he did it," Deedee said, crossing her arms. "I wanna know his secret," she muttered.
"Planning on getting arrested soon, Deedee?" Ethan asked. "No. I just wanna know how anyone can escape from that awful place. It's swarming with Dementors. And trust me, those things are nasty to come across," Deedee explained. "Yeah. Wouldn't want to be kissed by one. I hear their breath rots worse than the mouth of a red cap," Will said. We all shuddered at the thought of the Dementors. 

I looked out of the window and noticed something moving. They were cloaked figures floating in the sky. Just then, the trained pulled to a stop. I grabbed Tommy's arm doing so. 
"Why are we stopping?" Tommy asked. Everyone shrugged. Then, oddly everything became cold. The window was now covered in frost and we could see our breath. I pulled my long sleeves up, leaning against Tommy for warmth. 
Just then a bony hand had approached the door to our compartment and pulled it open. That's when I felt it.

Grief. Sadness. Depression. All in one go. I thought of everything awful that had happened since my mind was able to create memories. The worst part was that it was like I could hear the screams of Athena and Henry so clearly it was like I was there. I could feel their pain, I could feel what they were feeling. It wasn't good. I--I--feel strange. 

Before I felt things were going to get worse, the feeling went away and the room temperature started to pick back up. I still felt strange though. 
"Y/N, love. You all right?" Tommy asked. I didn't answer. 
"Y/N. Are you okay? Talk to us," Ethan said. I still said nothing. 
"She's really pale. We need to get her help," Will said. 
"I'll be right back. Imma go find someone," Ethan said, getting up. 

A few minutes later, he came in with a man with a brown mom of hair, a mustache, and wore brownish tan robes.
"Ms. Blackbird, can you hear me?" the man asked. I did nothing. The strange feeling  felt like it was getting stronger. 
"Here. Eat this. It'll make you feel better," the man held up a bar of chocolate. I did nothing. "One of you children are going to have to feed this to her. Trust me, it'll help her," the man said. "Thanks, professor," Ethan said, taking the chocolate. 

The man left the compartment and Ethan held the chocolate to my mouth. The smell of chocolate seemed to have triggered something because I opened my mouth and bit down on the chocolate. I instantly got a warm feeling in my stomach. I was able to move, so I took the chocolate form Ethan and finish the chocolate bar. 
"Do you feel better, sis?" Ethan asked. "Much, thank you," I replied. 
"Those were Dementors, weren't they?" I asked. Everyone nodded. "What did you guys feel?" I asked. "I felt really sad and cold," Tommy said. "I felt the same thing," Ethan said. Everyone nodded in agreement. 
"Why am I different?" I asked. "It affects people differently. Depending on experiences," Deedee explained. "But...I wasn't there when..." I trailed.
"When what, Y/N?" Ethan asked.
"Nevermind. It's nothing," I shrugged. 

How come I was able to hear their screams when I wasn't there when it happened? I know Dementors can make it seem like we're reliving our worst memories, but how can they make me see this one if I wasn't there?