My xbox dont stay connected

This sounds like an issue with your internet. I would try to contact them about the issue.

Yeah, see if your router has an update. Download the latest update, sometimes it helps in clearing up some of the problems.

try a mac address reset on xbox settings

You might want to contact your network service provider and see if they are having issues with their servers and check with some of your neighbors about their quality of wifi because this sounds like a internet issue especially since it started 3 days
ago, around the time that my internet started acting weird. I use comcast.

This sounds like an issue with your internet. I would try to contact them about the issue.