Why you SHOULDN'T go to the Caribbean:
The stigma is still there and getting worse. Program directors (PD), the people that decide if you get into their residency program/allow you to actually become a doctor don't always take kindly to Caribbean grads. Many Caribbean grads do get into residency in the US, which ultimately makes their degrees not worthless like it would be if they didn't get into a residency program. But those programs are normally the least competitive (not: lucrative, exciting, good location) out there. Many Caribbean medical students (I've heard ~25% of those that graduate) don't even get into a program (match) which means their degree and debt were useless, they can't practice medicine.
That's if you can graduate. The estimate I have heard is around 50-75% of Caribbean medical students don't even graduate because of high failure rates at those schools. The thing is if you're not ready for medical school, have a 2.5gpa and 480 on the MCAT you're just not ready for medical school. Students like that sometimes may say say "No, I am going to be a doctor." They go to the Caribbean and fail. Leaving them in at least $100,000 to $300,000 in debt without a medical license to pay for that debt. Those aren't your stats, but it looks like at this moment you are not ready for medical school in general.
MCAT
Study for the MCAT like it's a full time job. I recommend you study about ~200-300 hours total in a month and a half or two months. I mean 40-60 hours a week, take 5-10 practice exams, and get over a 502 on each practice test you take. If you can do that DO is an option. If you want the MD get over a 510.
GPA repair
@Goro, also known as a Guru is a valuable source on SDN. He is an adcom at a DO school. Take his advice with great weight. He just posted a post on GPA repair, I'm linking it below and make note of my post on that post.
Goro's advice for pre-meds who need reinvention
The key is you should do a post-bacc or SMP and get that GPA to a 3.5+ for DO or 3.7+ for MD. Retake any classes you got below a C- in.
Extracurriculars
Become a leader in some leadership position, volunteer at a hospital, shadow a doctor, and volunteer for another causes you support like food for the homeless.
I recommend you have 200+ clinical hours, volunteering counts towards this. If you can, become a scribe. You didn't ask about this but this is information I think you need.
Secondaries
They mean nothing. Everyone and their uncles get secondaries from schools. You can fill them out but everyone gets secondaries for schools they apply for. They aren't very selective at all.
Next Cycle
I don't recommend you apply this following cycle. Wait until you get above a 3.4 GPA in a SMP or post bacc program and a 500+ on the MCAT. If you have those scores, let's say anything below a 3.6 GPA and 507 MCAT apply ONLY DO. Apply broadly with every new school you find.
You
I know it's a lot and you could be trolling but in case you aren't, I believe in you. I know you want to be a doctor and if you work very hard and excel in a post-bacc program you can ****ing do it. I know you can.