Can’t stop myself from checking doorways, seriously considering moving my desk to face my door. Anybody else have this issue where they feel the need to assure safety even though it’s probably nothing?

I've become so obsessed with knowing whether my devices are hacked or not that I have been getting little sleep. I switch my phone off at night but I can't stop checking it intermittently to see if it's switched on by itself when I'm not looking. Nothing has happened, but I'm wired. Ugh

Has anyone ever had an intrusive thought of thinking you’ve might’ve swallowed something dangerous and you can’t trust your own mind? And you feel like you need to go in to get checked out? Any advice or reassurance?

Usually my compulsions are always motivated by fear. I feel like a child when I have compulsions. Like for example, my brain convinces me that someone is in my house and I need to open every cabinet and all the shower curtains, and do tons of other crazy things like march instead of walking so that if someone where to shoot at my legs they'd have less of a chance of hitting me. How do I stop it? I am just going about my day and I can see in my head, myself getting attacked or something and so my only option to calm myself down is to do a bunch of random actions that will keep me "safe". Does anyone else experience this? Or convince themselves that they are under Milo Murphys law? That anything bad that can happen to them will, so they need to never do anything that could result in anything bad, and avoid everything? And how do you convince yourself you're not in danger?