Because they came from a Joint account, I THINK you will be okay because the each give was under $28,000.
If the account was only in your name (or if the IRS considers it as a Gift from only one of you), then you would probably owe some significant Gift Taxes because your "domiciliary" is probably not in the US (you are only temporarily in the US). The $5.4 million lifetime exemption would not apply.
