What does this dream/waking up mean?!

I was laying down in my recliner head over onearm rest legs over they other. I didn't fall asleep but more or less passed out. I don't remember how my dream started but I know that it ended with me cleaning my room and i looked in a corner saw a weird string look more into it (sounds confusing) and I saw a normal size spider (I am very terrified of spiders) and I fell onto my back clinched into a ball and could not move I tried hitting my dresser to alarm my grandmother, but could not move any part of my body, I was hearing music the whole time but there was none playing in my house in the dream nor conciously. I started to wake up and I could feel my body shaking, once i completely woke up I was relieved and remembered what I was doing before I passed out. Any info that you think is connected to this is much appreciated. I am 15 by the way.