Ok I have a teenie little bit of a problem right now...

I was messing around with my e-mail on my phone (Samsung Glyde), and when I checked my usage info online, it said I've used 2 MB so far. I have the whole "Nationwide" plan or whatever (I'm charged $1.99 per MB used...which is fricking bull shit...) so yeah I know I'm like gonna owe $4...but my problem is I don't want my parents to find out I was using my e-mail on my phone. I told them it was just games and I'll never do it again (yes I lied/admitted it early so they wouldn't explode). Now will it show that I was using e-mail, or will it just say I used 2 MB on Internet or something like that?

Please please please help!!!!!