IF you speak perfect Spanish, and IF you want to be a doctor more than anything else in the world--really!--and IF you want a leg up on competition, I would recommend the PUCMM medical program in Santiago. It is not cheap, but since you are a Dominican it is dirt cheap compared to what a US citizen would have to pay or what you would have to pay in any US program.
Okay, why?
1) You get finished in 5 years of tough work with tons of hands-on experience.
2) You will have to take the same test that any US Medical school grad has to take.
3) Yes, it might be a bit tougher for you to get a residence of your choice, but that happens all the time anyway...
4) You will be at least 2, maybe 3 years ahead of everyone that went to US colleges and Med schools.
5) You will not be 100s of thousands in debt.
6) You will have more experience with real people than the rest of your residence class combined...there is little or no medical liability...
7) While BobK is probably right about some things, let it also be known that I have yet to hear of ANY of the PUCMM grads not doing well in their residency programs...so we must be doing something right.
I would not recommend this unless you are really committed to medicine. It has to be a passion above all else.
HB