If it ends up looking like UMich is the school you most prefer, they do have an accelerated masters in bioinformatics https://medicine.umich.edu/dept/dcmb/education/degrees/accelerated-masters-program As that page lays out, there are multiple options for undergrad major for that pathway, if you’re not excited about biochem.
So, even your “worst case scenario” is pretty great. I know this is a stressful time. But wherever you don’t get in (I’ll go out on the limb that you’d have been bound to get at least one rejection from your remaining schools, even with straight A’s!), you will never know whether a better fall semester this year would have made any difference. The grades are in the books, the applications are in, and all you can do is wait and see. (I understand that this is exactly the problem!)
High school will be over before you know it. Try to enjoy these last few months, make memories with your friends, and trust that you have a bright future ahead of you no matter how the remaining decisions turn out.