Spike in Data Usage

Hello,

I am seeking a better explanation on how my data use has gone from a max of just over 700 GB used in a month to having gone through almost 1200 GB by the 19th in this month. I do not have any reason that would explain what is on track to be a doubling of my wifi usage. It seems this could be a data reporting error of some kind. I keep getting emails about how I am nearing my limit. On Tuesday the email said I was at 75% and today it says I am at 90%. 15% in one day does not add up.

Thanks