If you start a degree program, and/or get accepted to a major, that tends to show up on your transcript.
Acceptances to med school tend to be contingent on completing programs in progress when you applied. You have to petition your med school to get out of completing a program.
Funding for a 2nd bachelors is not the same as funding a 1st degree. You won't likely find yourself eligible for grants and scholarships, and federal loans may be limited to just one year of $12,500.
Those are the risks. The benefits are easier to see.
Best of luck to you.