Piano of the Damned

Introductions
This is my first creepypasta, so I hope you all enjoy it! If you have any constructive criticism, feel free to tell me!

Now for the actual creepypasta.

The Story
A few weeks ago, my mom and I got a piano. It was one of those electric pianos, you know, the ones where it's not an actual piano; it has options for you to change the instrument the actual "piano" plays, the options being piano (of course), electric piano, strings, vibraphone (which sounds like a music box), organ, and harpsichord.

We came home, set up the piano, and I got signed up for music lessons, and after about a week, I began practicing "Hedwig's Theme" from Harry Potter.

As my sleep schedule is non-existent, I went to bed at 1:30AM, as did my mom.

My mom set the alarm for 9:30 AM, but I ended up waking up at 5:19 AM to the sound of the piano playing.

I wondered who was playing the piano at this ungodly hour, grabbing the flashlight hanging from my door, for when I went to grab a cup of water in the middle of the night, and walked out.

Nobody was at the piano, but it was playing, with the vibraphone setting on. I looked at the sheet music, and instead of "Hedwig's Theme" like I had there previously, the music sheet read "When Memories Break".

I was confused, as I never had heard of this particular piece of music before. I looked around for Hedwig's Theme, but to no avail.

I also checked if the piano was on, and it wasn't.

After a little bit, the music stopped. I fixed a glass of water with ice, and at around 6:25 AM, and went back to bed.

The next day... After my mom left for work at noon, I went to do my daily session of piano, and I looked at the music, and Hedwig's Theme was back, with no trace of the piece from last night. I was so confused, as things don't just appear and disappear out of nowhere.

After my session of piano, I went to play some Super Mario Maker 2 on my switch. After I played for a bit, I heard the piano play itself again, and went out to see what was happening.

It was the same thing as last night, "When Memories Break". I felt creeped out, as the piano played itself. I unplugged the piano, but it just continued playing.

I just walked away, continuing to play Mario Maker. As I continued making a level, I forgot the concept I was gonna make for the level.

This felt normal to me, as I was always a forgetful person, as was my mom. I just proceeded with my day as normal, as the music stopped.

That night... after my mom and I ate a midnight snack, I started heading to my bed, and felt like a chunk of my memory was missing. Shattered. Gone. I saw my dog, trying to tell her to stop, as she was a very hyper dog, and jumping on my leg.

I told her to go away, but then a pause afterwards as I tried to remember her name. Afterwards, I just shoo'd my dog away, and went to sleep.

At 4:25 AM, I heard the music again, as I woke up, and walked out, and to my surprise, I saw a ghost-like young girl playing the piano.

I asked who she was, keeping a fair distance from her. She said her name was Melody.

As the music ended, she faded away, and I felt more of my memory gone, as I couldn't remember where I was, or why I had a piano in my house.

This loop continued until I had no idea who I was, or why I was there. All I could remember was that song, always playing in the back of my head.

The end.
I hope you enjoyed it, and once again, constructive criticism is welcome.