I know life could be confusing as I was up for a doctoral degree but got declined by all my dream schools 4 years ago. Re-positioning myself to a job hunting and I have already worked for current employer for almost 4 years with passion.
I believe you are definitely a young professional with great passion. Why not seize all the opportunity you have? Intern with maths/biology related company. Research to see the eligibility of becoming a doctor? Apply for lab interns as well. Try it first and you can tell what you like :)
Jeremy recommends the following next steps:
Doing your research is the key. There are plenty of opportunities for people with a passion for mathematics, biology, and lab work. First I would suggest that you discuss your interest with a guidance counselor, if you are in high school, or a representative from your career development center, if you are in college. You can also go to your public library and search on careers in Biology the require strong math and analytical skills. Take more math courses. Mathematics helps you to develop the essential skills needed for detailed analysis, problem solving, and critical thinking. Seek out opportunities for working in this area through internships, entry level jobs, and volunteering.
Career research is very important. Be certain to discover and research companies that do the type of work that you are interested in. Another key component of your career search is self assessment. Become familiar with your likes and dislikes concerning career opportunities. Understand your strengths and areas for improvement. Compare that to what is required for the career you are seeking to determine how much of a match you may be for a particular opportunity, and areas that you will need to improve upon for the opportunity that you want.