My guess is you're going to pay at least $.20 per text message. Why would you ask cha cha? CALL VERIZON. Chacha doesn't know the details of your plan... Verizon does.
what if my phone has unlimited talk & text and i only texted USA cell phone numbers?
You don't really know how cell phone plans work, do you?
Most relevant
link I could find. If you have unlimited NATIONwide, you are going to pay out the ass for all of those texts, because you are paying for coverage on the NATIONAL network. If you have unlimited international coverage (doubtful), you will not be charged extra.
Edit: Again, why are you asking strangers on the internet. The only person with a definitive answer (and final control over your bill) is VERIZON. CALL VERIZON.
Edit the second:
Verizon's page on texting while outside the US
Fifty cents for every text you sent and five for every text you received. I hope for your sake that "a good number" of texts doesn't mean 200 or 300 a day, like I sometimes do.