Fear of prolonged silence?

So with testing back in season, I think I've come to conclusions about something. But first, a little backstory.

Ever since I was little, I hated taking state tests. We have to sit there in silence for at least an hour. And I hated finishing early because I would just sit there staring at the clock. The silence really bothered me. I feel like when it's too silent, I can't breathe. I feel the need to hear some kind of noise, or else I get nervous and anxious. Even when I go to sleep, I have to have my tv on.

So what I'm trying to say is, could it be that I have a fear of silence?

I have another test tomorrow and we have to take both sessions tomorrow. Each session is probably 70 minutes and I'm honestly getting nervous just thinking about it. Not the test-taking part. Just the silence part and the fact that we are also in an enclosed classroom (since I am also claustrophobic). And if it's too silent, I feel like I have to make some sort of noise on my own like tapping rhythms on the table or humming. But I obviously can't do that during a state test, because in would get in a lot of trouble.

Just... please help me out in figuring what this is all about. it's been going on since I was little.