To be honest Tonya, i don't think that a second MS will do you a whole lot of good. The thing is, you already have 150+ credits under your belt of 3.2.... That will be difficult to bump up. Even if you 4.0 another 30 credit masters, it will only bump you up to like a 3.3. That boost of .1 to your GPA, wont really do a whole lot of good to your application. However, if you were to boost your DAT to a 22+ that could make things happen for you.
So i think there are 3 options:
1. Study your face off as long as it takes and kill the DAT. Will your extensive science background, i imagine that you will be able to destroy the natural sciences. And even if you do kill the DAT, you will need to apply to like 20 schools to increase your chances.
2. If you are hell bent on a second masters to boost your application, i would definitely do an MPH or MBA. You need to have something to fall back on just in case you don't get in. Not to mention these programs are usually 45-60 credits which will do more a dent in your GPA. Your sGPA will remain the same, but you may boost your oGPA to 3.4ish. I think with an MBA coupled with your MS in Bacteriology, there might be some nitch markets for you at biotech, pharmaceutical, or research firms.
3. You may want to consider other professions. Have you considered pharmacy, optometry, or podiatry. Each of these fields are much less competitive and you can still have a respectable profession while making a good living and helping people. Maybe you could even shoot for a PhD and go into research or academics.
Best of luck with your decision!! 😀