Yeah I'd probably be OK. Even if I watched 12 hours a day -- which is a dream of mine -- I wouldn't come close to 2TB.CenturyLink doesn't provide a way to check this. They don't charge for overages...yet...but we haven't gotten any nastygrams from them.
According to Netflix an hour of HD stream from them uses about 3 GB of data. There's 744 hours in a 31-day month; you would end up at 2.2 TB of data streaming Netflix all day in a month. 4K streams will use more, but I really doubt you have anything to worry about.