An air ambulance back to America

We took my senior class trip to the Bahamas. My mom went with us as a chaperone. While on the cruise, she became critically ill, The hospital was able to get her somewhat stabilized, but they want us to get her back to the states as her insurance won't cover costs abroad. We need some help now! The only way they can safely transport her is by air-ambulance. We have been told that in order to get her back home we'll have to come up with $14,000. Please help in any way you possibly can...big or small. This is literally a nightmare, and am ready for it to end, we need all the help we can get. This is my Mom, my everything... please help us get her home so that she can watch me walk down the aisle to receive my diploma in the coming months. Thank you in advance for all of your help and God bless!