What am I going to do?

So, I'm still shivering.

My dad told me to switch off my lights and the fans down there (which is dark and I'm alone).

I turn them off and I quickly ran upstairs. 

I tought I saw a shadow on the wall and I ran as fast as I could.

I saw another 'ghost' standing in front of the aquarium, smiling creepily.

This happened to me all night (if I was the last one to go upstairs).

But this is the most worse.

I'm still shivering.

I can't breathe normally.

My heart is still beating fast.

I searched at Internet and it says that I'm always out of breathe and my brain can't operate properly. (If I'm not mistaken)

It also says that this happens to pupil that always snores when they are sleeping. They thought that it was nothing, but it was something bad. And they will awake at night because they think that they can't breathe properly. It may also kill you silently. (some of them happened to me)

I had a nightmare once, where I was chewing a chewing gun and I swallowed it. I feel like I can't breathe and I forgot what happened. It was a bad thing. I'm a chewing gum lover, and I will always swallow it. Now, I can't even face the chewing gums at the markets. I'm scared. What am I going to do?