Could my house my haunted?

I'll write down all examples of weird things that has happened to me in my house.

1. When I was little, according to my mom I was something looking into random corner along with our dog we had back then, and often laughed or smiled.

2. When I was about 7 years old, I was looking into hallway of my aunt's flat (for context, we live in a family house that was build by my grandparents, but there are multiple floors/flats) and there was a shadow of a person that looked like someone in a coat and hat walking to the end of the hallway. My uncle could walk through the hallways in that moment though, so this isn't the weirdest thing.

3. When I was 13-14 my mom has told me that our dog was following something flying through the air with her eyes, until her gaze stopped at bunch of toilet rolls and one of the toilet rolls suddenly fell to the floor.

4. When I was 14-15 my mom has told me that our dog was seeing something again by my bed, as if someone walked there and my mom heard footsteps. I think that she has told me that it sounded like my father's walking, who used to have an office where my bedroom is at now. (My father is alive, my mom and him are just divorced.)

5. Last thing that happened to me at 15 years old few months ago still terrifyes me and I'm quite paranoid in my bedroom since then. I was trying to fall asleep, when I heard kind of quick footsteps going from the kitchen to my bedroom. When it reached my bedroom and I heard as if someone stepped on the floor of my bedroom, which is a very specific sound, it was as if someone just started intensely staring at me. In that exact moment I hid under my duvet. I've never felt like that before or after. When I finally got the courage to look out, expecting to see something, there was nothing. I was alone that night, only my dog was there.

In a room where used to be my parent's bedroom there is a horrible energy, so I think that there is something left from my father, who was honesly an a-hole. It would explain point four, along with by belief that sometimes the past can somehow leak into the present, because technically past, present and future is happening at the same time. I can't explain rest of the points other than there could be some spirit in our house though.

(Apologies for grammar mistakes, english isn't my native language.)