Are we considered 'mentally ill'?

Lately I’ve been feeling obsessive compulsive sick. (It’s my way of saying that my mental illness is making me feel unwell) I hear whispers to be honest, telling me to do awful things to others and myself. They tell me how horrible everything is, they yell and scream at me, and tell me violent harmful things. Sometimes they plead for help, other times they try to lure me in to believing them, and worse of them, they threaten me. They have a gun pointed to my head and laugh at me, saying “I should’ve known you always been such a worthless piece of shit, hahaha, kill yourself you scum of the earth.” The voices are scary, but they are just voices, but they are still scary. Sometimes I want to see if they are true, but then it backfires. I am so gullible to the thoughts and believe them without warning, but when it comes to me, I am stubborn and headfast. I follow my rules, eventually breaking them out of fear. Sometimes, people can’t take it anymore, and fall. They fall off of buildings, bridges and their chairs. The voices over power them and then, they are gone. We are survivors of our own mind. We are programmed to live, but are forced by our own mind to fear itself. What a horrible fate that we are responsible for dealing with. A illness that has the same caliber has a physical one because both end with one thing: death. Death of our values, our health, and our actual life. Treat it seriously, it’s a mental illness for a reason.

Today was just too much. While doing coding, I couldn’t understand one code logic and my brain got completely stuck. I felt like screaming loudly but didn’t want anyone to hear me. Then the milkman brought the milk, so I thought I’ll boil the milk and make some green tea, maybe I’ll feel better. The sugar I was going to use had ants in it a few days ago. I had kept it in sunlight and the ants ran away. Now every day I take out just the amount of sugar I need and lightly clean it, just checking if there’s a dead ant or not. But today I brought the sugar into the light to clean it and ended up just cleaning and cleaning. I saw tiny black dots and started picking them out. When I looked closely at one of them, I felt like it was ant droppings. Then I started cleaning it deeply, probably spent half an hour just cleaning four spoons of sugar. I kept thinking I should just throw it all away. I even imagined myself throwing it away multiple times. My mind was so disturbed but I controlled myself thinking all my effort will be wasted. Then I thought—if one day I’m alone in a jungle, and there’s a dog eating a dead animal, or a dog eating another dead dog, and I haven’t eaten in days—will I try to scare the dog and eat the dead animal? Yes, I would have to. And what if there’s no water to clean it? Still, I would have to eat it out of helplessness. So after all this, I finally relaxed a bit and put the sugar into the milk. And decided that tomorrow I’ll buy new, clean sugar from the shop. I don’t know what all this is... Is this overthinking or am I becoming mentally ill?

I know that sounds a bit harsh, but people with OCD think very differently then everyone else and we do strange things. I used to think OCD was just that we overthink to much and have compulsions to fix it, but its kinda alot more than that i realise. Like peoples lives are legit debilitated from this thing. Thats serious and i dont think others realise that. Mabye im concerned too much idk.