Do you have a job here in the US or a co-sponsor lined up? I just ask because you mention that you are "poor." You have to meet a minimum income or have enough in assets.
For someone to use VWP or a visitors visa with the intent on staying and applying for AOS show that they lack a basic respect of US laws and they don't deserve the right to stay. Do they get away with it , usually. Are they good moral people definately not.
US LAW REQUIRES THAT ALL US CITIZENS DEPART AND ENTER THE UNITED STATES ON A U.S. PASSPORT!!! THIS IS A MUST!!!
NOW IF YOU DO HAVE A TICKET AND NEED TO LEAVE THE COUNTRY RIGHT AWAY YOU CAN GO TO YOUR LOCAL U.S. PASSPORT OFFICE AND SHOW THEM YOUR TICKET ALONG WITH
THE APPLICATION, PICTURES, AND FEES...CHECK THE WEBSITE....GOOGLE U.S. PASSPORT AGENCY IN YOUR CITY OF RESIDENCE FOR MORE INFORMATION...
I WOULD NOT LEAVE THE COUNTRY WITHOUT A US PASSPORT ....AND EVEN IF YOU DID....HOW WOULD YOU COME BACK TO THE USA??? ALL AIRLINE EMPLOYEES ARE REQUIRED BY LAW TO MAKE
SURE PASSENGERS HAVE THE NECESSARY VISA, GREEN CARD, SOMETHING TO BOARD A FLIGHT BACK TO THE USA...SINCE YOU DON'T HAVE YOUR GREEN CARD ANYMORE....I'M ASSUMING THEY TOOK IT WHEN YOU WERE NATURALIZED ....WHAT WILL YOU SHOW THEM AT THE AIRPORT TO PROVE YOU CAN RETURN TO THE USA??? THEY WON'T LET YOU BOARD THE FLIGHT BACK....
GET A U.S. PASSPORT!!!!