It’s not really as easy as all that, to keep both options open. Nursing is a great choice with lots of opportunities, but there are good reasons why it’s relatively rare for nurses to go to med school. Not unheard of, but for the most part a decision to go to nursing school makes ending up in med school even more unlikely than if you take the premed path. That should be understood and accepted if you choose nursing.
Also, double depositing is problematic and should be resolved ASAP.