Yes, you can still decide on med school, if that’s what you want. There’s most definitely no such thing as a master’s in premed. You’ll have to take the standard premed classes at a 4 yr college, and do very well in them before you can apply. You’ll also need to do some clinical work, maybe some clinical volunteering, too.
As a first step, I would recommend enrolling in premed track Intro Chemistry, and maybe also premed track Intro Biology for next (spring) semester. See how you do in those. If you do well in them, then assuming that you have family support so that you can live at home for free and not hold a job, plan to do more over the summer and next year at a nearby 4 yr public college, if you can’t afford to do it at the college you’re currently at. If the course offerings don’t line up with that for the summer, maybe you can do both semesters of Physics over the summer, and continue with Bio and Chem in the fall.
You will need two semesters of Bio, two of general Chem, two of Physics, and two of Organic Chem, all with lab. The reason I recommend starting with Chem is because you need 4 semesters of it. Some people can get this all done in 15 months - a summer and two semesters. You will also need some math and English (but you’ve probably already done those), and perhaps a semester of psychology - it depends upon the school. And you’ll need to get very good grades in all of this, and do very well on the MCAT. Even if you were able to take two science classes in the spring semester, the earliest you could possibly enter med school would be fall of '25, and more likely, '26. BTW, med school is EXPENSIVE, too.
There are post-bac premed programs at colleges, but the private ones can be expensive. It won’t really make much difference where you take your premeds, as long as it’s at a 4yr college, not a community college. There’s surely a premed advisor at your current college. I’d advise you to make an appointment with them and talk with them about your options.
You do have a chance at this. Your high GPA from undergrad will help. If you were good at science and math in high school, this might be an option for you. If you were not very good at science and math in high school, then another option for you might be to get a nursing degree, and try to become a nurse practitioner. There are BA to BSN programs at state colleges, that can get you your BSN in about 18 -24 months. Then a year or two of bedside nursing, then go for your NP certification, and you can pretty much practice independently, without MD supervision, in many areas of medicine.