Scary moment

One day I was walking home like usual. But when I kept walking I heard something behind me, couldn’t really tell what this thing was so I kept walking,walking,until a bush in front of me moved like something was in it so a walked toward it... “hissss” It was a cat and a black one a ran so fast it was scary in my perspective, until I looked back,the cat was gone.so when I came to my house I unlocked my door closed it and went upstairs a few minutes later I heard someone knock on the door I came to look and it was just a mailman delivering mail. I took the mail went back upstairs and when I was sitting on my bead reading for a couple of minutes I heard a knock on my closet I checked my closet nothing was there. Until I heard the same knock again so I decided to put my bed next to the closet so it wouldint make that noise. And then my doorbell rang I was getting creeped out “fist a cat now a banging noise and now a doorbell?” So I went downstairs I thought the mail man for got to give me something but he didn’t nobody was outside on my deck I started to get scared and I called my dad to see if my dad was going to answer or not until he said he was going to be back at 5:00 and it was 4:35 and I was OK for now until my brother came home and nothing happend after that, I was still curious on what made my closet knock.