rejected from US Med schools/when to apply to Ross, st george??

Hi, I am in the process of applying to med schools here in the US. If I don't get in the first time should I reapply thru AMCAS or consider applying abroad? Are foreign medical graduates really that disadvantaged?? It seems as though schools like Ross and St. George are ok but are they really a scam or legitimate?? If my dream is to become a doctor then should I consider going to a Caribbean school?? If so which one is the absolute best?? Thanks, B