I am channeling my inner Donald Trump as hard as I can...
If you don't do well in Freshman chemistry, you can't be a good doctor. I'm sorry, but medical schools simply will not want you. Just because your grades keep getting better, because you didn't do well before, nobody will ever want you. It doesn't matter what you want, you are stuck with it.
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You making this thread portends a worse outcome than your grades. In all seriousness, consider talking to someone in person.