internet data use

I posted this yesterday but it has mysteriously disappeared.

I went over the 1229Gb data limit for the first time ever last month.  I think something changed.  We had a service outage in our area about a week ago and since then my usage is 2x-3x.  Our habits have not changed during that time.  We usually use 700-1000Gb per month.  Now just for the first 2 days of October we are at almost 200Gb used, which will be well over 2000Gb for the month.  How is this possible???