Hi there

I picked up my passport with the visa there. Along with that, I got a sealed package from the embassy, yup, that one that should be given to an officer at the port of entry in the US. I'll be departing this Friday, and need to know what else I am supposed to take with me. Should I take anything else apart from my suitcases, passport, flight ticket and this package? I'm extremely concerned about this and would like to know what the ones that have been through this or whose fiancé(ée)s have been through the same know about this. I mainly have concerns about whether or not I'm supposed to be taking cash with me, I know that students and people with tourist visas are supposed to have what we call in Spanish "bolsa de viajes" which is more or less the amount of $500. Also, I wonder if I need to be taking my vaccine report or that's in the package, and if there's any form I should be downloading, filling in and taking with me that day.
Any help would be highly appreciated! The day of my departure is pretty close!!! Thanks in advance.
Johana
P.D. I'm flying from Lima to Houston. Also, I'm taking my kitten with me

if anyone has taken any pet, let me know how it went, heh.