Being an uninsured pregnant visitor in USA, can I get any insurance or financial aid for maternity expenses?

I came to visit my sis-in-law in Mew York during my my 5th month with a plan to go back within 4 weeks. I grew complications and have been instructed by the Doc to not fly and stay home. I'm already paying the high doctor's fees but simply can't afford the huge expense of hospital and lab. What do I do? Any Govt. aid program or private insurance program available??