Come back to Puerto Rico!!
There is no "coming back", you are still THERE, meaning , under US jurisdiction, tehcnically you lever left the states, because PR IS a US territory since 1898. If you are a US citizen you could travel freely to PR without the need of a passport or visa, only one ID with picture. You only need ID for Homeland Security and Airport Security, like at any US airport. It is the same currency, the same airlines, the same federal agencies, same car rental companies, etc., that you would have at any other airport in the US.