No one can entirely relate to your situation. You have a very unique situation. All I know is that usually people who are highly successful and fall usually have the ability to get back up and achieve that success. You have lots of barriers it sounds, a sick child, in a new country etc. but I think you can do it.
Now, can you step back from all the pain and shame in the gambling losses and deceit of family/friends/business people back home and honestly evaluate if your family will be in danger. Why would they be in danger, do you owe money to people who are capable of hurting your family or is the whole situation just have you so on edge that you are afraid of anything now, even if the likelihood is extremely low. Please let us know your thoughts.