Applying to both dental school and pharmacy school?

So, for the last 8 years I've wanted to be a dentist. I'm currently a licensed dental assistant so I have experience in the field as well as a 2 year degree in dental assisting. My undergrad GPA is just about a 3.3, but science GPA is a 3.2. I still have one year before I apply. However, my concern is not getting into a dental school. I wanted to find an alternative so I chose pharmacy school as a backup. I don't have any experience in the field, but one could suggest my interaction with patients on a daily basis could count as some related experience. I wanted to know if it'd be a good idea to take the DAT and the PCAT this year and apply to both pharmacy school and dental school at the same time? My third choice would be to get a master's or PhD in biology for example genetics or stem cell research. I don't have a lot of guidance as it is and I'm reaching out to whoever may be able to help me.

Should I just finish my pre-reqs for dental school as I am now and if I don't get in, enroll in post baccalaureate program to finish my pre-pharmacy prerequisites? I don't know what to do.