Default [Q] Massive Data Usage

Not really sure where to put this, but I am on a t-mobile network and have always had 2GB per month. For the past 2 years I have NEVER gone over that amount. So I upgraded to this phone this month and upgraded to 3GB of data per month. Now I have ten days left until my billing cycle ends and I am already at 2.96GB of usage?? I haven't used my phone differently and I use wifi almost exclusively in my house. I'm not calling conspiracy, but its weird that all of the sudden with a new phone and new plan my data usage goes up. Today alone I hardly used my phone but it says I used 275MB on Chrome. All I did was search a few things on google. No video or anything! Any thoughts??