you're probably right

the most I can get is 10GB but that should help if I do some stuff with free wifi at work. I love where I live but internet really sucks here.
This is the panel you want to be looking at, specifically the in and out total shown in parentheses. What you were looking at had nothing to do with the internet, you were looking at RAM consumption and processor usage.
They will tell you how much data was passed through your internet/network connection since the last time you rebooted.
I suggest you reboot the computer, with the "Reopen Windows when logging back in" option unchecked.
Once the computer has booted check to see if you have any network activity. This'll be shown by a speed in kb/s on the in and out. A spike once in a while is normal, the computer is communicating to the modem to insure it remains connected.
If you see a steady stream of data as you start opening your usual apps back up, then you'll find the culprit.