After reading your post shared from another forum, my thoughts are this...
You applied 6 times apparently before being admitted and you did not pass your first year. Without more information, it appears that you may have struggled with undergrad with having to repair GPA to match your MCAT which was mentioned to be old. You then struggled with 1st year only to be dismissed. It appears the struggle was great because if it was only 1-2 classes, most would have either remediated and moved on, or been offered to repeat the year. You were dismissed. That tells me that grades were extremely low and/or you failed more than 2 classes. This is not a good track record, and demonstrates even more that you'd be less than likely to be re-admitted. Going Caribbean would be a disaster for you with even less support and higher costs with lower chances of residency because you now have an addition transcript showing failures and would be Caribbean student.
It's time to cut the losses and utilize your MPH and make way in that sector so that you may still be involved with healthcare in some way. At this point, your involvement in healthcare will not be as a physician, and I'm sorry to say that, but someone has to say it.