Anxiety or paranoia?

my door is directly behind me at my desk, and it bothers me because not being able to know whats behind me or going on in my house starts to fester in my mind, so i made a habit out of turning around every time im unsure whats behind me, but i started to have severe neckpain from that, so i just bought a webcam so i can always have the camera open to monitor whats behind me, but sometimes i want to use the webcam to record my hand and mouse in game, but I've noticed if i can't see behind me i cannot focus and have to turn around again and again, and if i dont turn around it will get so bad to the point where i feel like someone could possibly standing behind me with a gun to my head and id never even notice, or my house could be getting robbed and id be sitting here like an idiot. if possible i would be extremely more comfortable with my back against a wall, and cameras everywhere, but i can't do that, currently... is this a mental disorder or does everyone feel this way

Anxiety or paranoia?
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