(carefully looks around)

uhhhhhh just a thought.... Promise not to to yell at me?

That's a relatively big change in only 2 months hon. While bust size can keep increasing some after puberty, that's still quite a change.
If you haven't gained a significant amount of weight in that time, and you know that you're not pregnant or started somekind of hormone therapy (like BC pills), you might want to see your doctor. This might be a result of a hormone change of some kind.

*WW runs away to hide after giving medical advice when she's promised not to anymore.*

W

__________________
"I wondered, am I a lesbian, am I straight, or bisexual? Then I realized that I am just a slut.
So where's MY parade?"

---Margaret Cho