Interner just lost signal

First. Check their site for official info on any possible local outages here;

https://www.xfinity.com/support/status 

Use a cell phone internet service, a public WiFi hotspot, or a neighbor's internet if you need to in order to check it.

Or you can use their Xfinity App: https://www.xfinity.com/apps 

Hi there, @user_rhqc5h. Thanks for reaching out to us here on the Community Forum and sorry to hear about the service trouble. Have you checked to see if there is a known issue in the area? You can find ways to do that listed here : https://www.xfinity.com/support/articles/check-service-outage. I personally recommend the XFINITY App for this purpose, I use it myself and find it to be the quickest way to find out.