Hello, Close To Eye, But Not In My Eye I

Hello, close to eye, but not in my eye I have like a white circle, when I close my eye you can see it better. It's like left to my eye. But i have had it for some time now and I don't know what it is, I think it's getting bigger I don't know it scares me
When you look at my fave you see a white like circle, it's not too big but it just worries me