quite honestly...GPA could be an issue. If financing is not a problem for u and SGU does accept u into final year (12 months) of premed...I guess, it may not be a bad option.
However, I think you do stand a good chance@ MUA's premed since you do have 92 credits. Its 8 months comparitively and gives you a head start. Do keep in mind, you need a 3.0 GPA min. to marticulate into Med program. I have completed premed program here and i think it adequately is geared towards preparing students well for the med program. Plus, 8 months give you a good head start to getting adjusted on the island...which is subjective coz some ppl really don't need that much time.
I am not aware of any other caribbean school offering premed...I would not recommend Windsor @ this point in time for premed or med.
Good luck and apply to both schools.... I am sure it'll work out for u in the end.

Good luck!!!