I'll start off by saying I'm very sorry if I upset you at all with my post. You're in a very awful situation and I can only imagine how terrible it must be. It will work out one way or another.
Now... You can attempt rematriculation into another Caribbean medical school, but your options really start to become limited. Since you've already failed Step One twice, your options are already limited for licensure after residency. Some states only allow two attempts per any USMLE step exam. Most states allow three or unlimited attempts for licensure. So even though you go to a school that allows for licensure in all 50 states, you've become limited due to your current situation. See this FSMB licensure website for details in each state; <
http://www.fsmb.org/usmle_eliinitial.html>. If you've already ruined your licensure possibilities for whatever state you want, then perhaps you should go to Plan B (see below) and so on.
PLAN A
Theoretically, it can still workout for you. You're going to have to set your residency options very low. Your only honest chances of matching would be in fields like family medicine, psychiatry, pathology, and possibly pediatrics. And even with that, it's going to be very difficult. You'll need to apply to AT LEAST 100 residency programs. I would suggest 200-300 (~100 each specialty). The reason for needing so many is that your application will be screened into the "No Interview" pile for so many programs (which means not matching there). One of the other things you'll need to do if you make it to clinical rotations is be absolutely stellar. You'll need to do well on rotations and try to impress as much as possible at potential residency programs. Often times a person may not meet the screening criteria of a particular program during match applications, but they'll still get an interview because they did a rotation there (two of my interviews were like this, I would've never gotten an interview had I not been a student there). Now, about which schools to attempt... You had best do yourself a favor and try anything you can to get back into SGU (post aboves mentions it is possible to get back in after two fails). If you can't get back into SGU, then you should go for something like St Matthews, AUA, etc.
PLAN B
Apply to D.O. schools. They do equally well, or better, than us Carib M.D.'s in the match. In fact, at this point, if you could get into a DO school, don't even screw with the idea of continuing with Plan A, unless perhaps you can get back into SGU. And even then, you're residency opportunities are WAY better if you got into a DO school at this point.
PLAN C
Being a medical physician is a lot of work, but it's also very rewarding. On the other hand, there are lot of great healthcare professions outside of medicine per se. Consider other great options... Dentistry, Optometry, Podiatry, Chiropractic, Physical Therapy, Physician Assistant, Pharmacist, etc.
PLAN D
Law school doesn't seem to be too bad either.
PLAN E
Get a Ph.D. and become a professor.
No matter what you choose to do, you're young and you have your whole life ahead of you. You'll be okay.