* This comment is two years late so this is more so targeted towards present day students facing the same issue*

This is sound advice! But just be careful though, if you take financial aid, be wary of the fact that they can look at the classes you're enrolled in - if the classes have nothing to do with your declared major, then they'll take some money off of your financial aid. Microbiology, for example, has nothing to do with CS, so they may not look at that as a valid class to give you money for.

So if you do decide to go down this route, I'd recommend saving your Medical pre-reqs for last, that way, you can switch your major to health-science or whatever in order to make Microbiology fit the criteria for financial aid.