Most medical schools in this country will grant an Leave of Absence for emergency "family problems" that occur. You need to speak with the administration at your medical school for their policies on this ASAP.
Under LOA, you can't transfer into another medical school. In order to do transfer, you must be in good academic standing (LOA means you have no academic standing because you are not in school under an LOA) and have the permission of both schools for a transfer. Under an LOA, you won't get permission from another school for a transfer which means that under an LOA, you have to solve your problems, go back to your original school, complete at least one year and then apply for transfer if you meet the criteria at that time for a transfer.
If you drop out, you are likely not going to be admitted into any school in this country. In any event, you need to be discussing your problems with your school administration who will assist you in figuring out a sound course for your particular situation. This means that you should get off the public message board and get in contact with the people who can actually help you most.