I'm not sure what happened, I didn't change anything besides putting my ethernet to my PS4 so it can download an update since the Wifi is very poor and put my ethernet back into my PC after I was finished. I run on a 500M package, and all of a sudden it's just using 50Mbps, it's never done this.
the Upload speed is horrible aswell, usually, it's quite high during mornings and afternoons but dips during evenings, but it's just at 2mbps all day long even during late hours of the night and that's when the upload speed is back to normal