I Have This Feeling That Something Is Wrong

I feel really off today.. I woke up tired. I had to be to work at 9 but for some reason I really didn't care. I slept in a bit and got ready and was 20 minutes late and totally unbothered. Right when I got to work, I got this feeling that something was wrong. I don't know what. I feel like I'm not alive. It makes no sense and I feel crazy saying it but I feel out of it. I'm talking to people and walking around doing my job but I feel like I'm in the 3rd person like out of my body. I thought maybe I was dehydrated so I started drinking water. Maybe it's the lack of sleep but I've always had terrible sleeping patterns. I'm in the stockroom now and I can't even think about work. I'm very confused because I don't think I've ever felt like this before.