Do you like to work with athletes? If so, you may want to try athletic training. It fulfills most of the PT prereqs and you can still have a decent job (with long hours) if not accepted into PT school. On the other hand, as an athletic trainer, you may have an upper hand on getting into PT school (if you keep your grades up) as you are exposed to and well-versed in injury management.
Otherwise, major in something you are interested in.