Question about Iphone monthly data? Please help!?

[angel]

I've had and Iphone 4 for about seven months. I have Verizon and I'm allowed 2 gigs a month. I have 3G. And the monthly bill is on average $100 (including insurance).
Normally I get notified that I've "reached data allowance for the bill cycle" just a few days before the billing cycle ends. And I get charged about five to twelve extra dollars.
But this month I reached the data allowance 10 days early! And I've continued to use Facebook, Facetime, lots of texting, calling, and other apps that require internet. Is there a way that I can check how much data I've actually went over? And how much it's going to cost me? The billing cycle doesn't even end for another 7 days! And is there a way that I can get more than 2 gigs a month without breaking my two year contract? This is ridiculous! Please help!