My Dreams And Visions... Any Advice?

I don't know how to explain it. It was a kind of crazy day. Let's start with the dream I had about two weeks ago.

Well, in the dream we had a sub in science and he had light hair, darker eyes, and a blue shirt with jeans on. He was talking about momentum and velocity. (I still don't get the difference.) And as he was talking, my friend Andrew (not real name) kept talking and interrupting him. Then the sub got annoyed and made us do all the work on our own.

And then today in science class, we had a sub. He had dirty blonde hair, brown eyes, blue shirt, and jeans. He looked exactly like the sub from my dream. Then he starts teaching us (of course) momentum and velocity. Andrew kept talking and the sub got annoyed and made us work alone. It was just so strange to see it all happen again.

But that wasn't the weirdest part of my day. I am a student aid for a sixth grade class with my friend, Carmen (fake name again, sorry). So we were grading and sorting through papers and the fire alarm went off way louder than normal, so I jumped because I was startled and covered my ears.

Luckily, the teacher was out of the room and the students were busy working, so only Carmen noticed. She looked at me like I was insane, then she asked if I was okay. Lately I've been quicker on my feet so I just used the first excuse that came to mind and blurted out "Yea, I just have a head ache." And she just believed it and went back to work. That was about 7:30 this morning.

Around 9:00, I was sitting in my language arts class typing up an essay on winter tourism and when the site finally loaded I was a white flashing light, just like the fire alarm lights. I looked around to see if anyone else had seen it, but no one had. I just shook my head thinking it was my imagination.

I put my fingers back on the key board and right as I did the alarm went off! My eyes went wide and I swear my jaw must have dropped. Because usually the things I see in my visions, or whatever you want to call it, don't happen until about a week or two after I see it.

When I turned around to head out the door I saw my friend looking at me laughing because of my facial expression. She doesn't know about any of this so she wouldn't understand even if I told her why my jaw was dropped. I shook it off and laughed with her. She said to me, "You should've seen your face! You looked so freaked out!"

I don't know what I'm supposed to do. What if it happens in school again? But what if next time it's something more serious? Like someone bringing a knife to school? Just go to the principle and say, "Oh, yeah. By the way, I had a vision a few minutes ago about someone bringing weapons to school." He'd probably think I was insane and send me to a mental hospital.

My parents would say the same thing (yes, they know nothing about this). "Yeah, she's insane. She needs to go somewhere and get help." I know the 'help' they talk about won't really even help. It will just make everything worse.

I don't want to go to school again and have a vision or hear or whatever I do. I don't even know what it is. Anybody have comments or advice?