First of all, congratulations on your accomplishments so far.
Now, I am going to focus on a few things you said. You want to be a doctor and you want to keep your costs down. Your FAFSA speculates that your family’s expected financial contribution is higher than is comfortable.
I understand that you may want to leave the South, but let’s be realistic for a second here. While merit aid is available for undergraduates, it is not exceedingly available for medical school (I know, I went to law school and my wife went to medical school). So, you need to consider the potential future cost of medical school now when considering colleges. Otherwise, the undergraduate debt you incur added to the medical debt you incur will impact your abilities once you graduate from medical school (opportunity costs, etc.).
Clearly, you are a candidate for competitive merit aid. To that end, find colleges and universities that “fit” you and apply there. But, fill in your list with public universities that offer defined, automatic merit aid. The cheapest for you will be Alabama–Huntsville (you thought I would say 'Bama, didn’t you?). UA-H is an excellent STEM university in the south. It was founded to educate the people that put us on the moon (literally). It is in-state for you, so you have reduced costs and defined merit aid. Outside of it, you have 'Bama. Again, defined merit aid.
If you want to look farther afield, I would entertain:
Auburn
Arizona State
Arizona
Texas Tech
Iowa State
Mississippi State
New Mexico
Utah
Only one of those is in the South. Of course, it would likely be the cheapest of second cheapest option outside of your in-state choices. None are in the northeast…maybe you look there for medical school?
Best of luck.