Do you have any documentation proving your work there (some pay stubs, employment record, etc.)? Do you have a degree from your home country?
Yes, I know, you don't take along many of those things when you move to a new country, or lose some of it. I was not born in USA myself. But if you have some of it, take it to a certified translator (yes, I know you can translate it yourself, so do I
) and translate it into English. Preferably, find a technical translator to take care of your more techy documents. If you have a degree, check what agencies are generally trusted by employers, and evaluate your education there.
While "non-USA experience doesn't count for much according to many managers"
, you are better off having it than skipping it. You might start omitting it if you wish after you have 10 or more years of USA experience.
Try to find some people that might give you a reference - there is a chance that some of them currently also live and work in USA. Keep phone numbers of those that are still in your home country, too, but rare managers actually call abroad (but it happens, too; and they sometimes find people speaking your language to do that).
As was mentioned above, be honest; it might help you.