Hello Thefallenone and welcome to the forum. Well done on looking for help.
Unfortunately no one can change the past, what has happened has happened. Regarding the fees talk to the Medical School and see what options there are.
Yur dreams don’t have to end but you might have to put them on hold while you address your addiction and look to earning money and a credit rating of your own.
As you do that it is important to address your gambling addiction, read the other stories here, look at the other support you have available. You will have money again and it is important that you have things in place to prevent you chasing your losses.
You will see the success stories here, what are they doing that you can apply to your own situation?
Keep posting.