Need Advice

Hi guys, wanted to pick some of your brains on something. I am just starting my junior year of undergrad at the University of Delaware. I went into school thinking pre-med, and am currently a biology major and also am doing a business admin minor. I am in the honors college here and have a 3.94 gpa as well. I am thinking about changing career paths and wanting to go into banking and explore finance, but all I have is a strong gpa in a tough major (no finance internships or experience yet, although some relevant coursework with my minor). I am aware my school isn't a target school, and went here for pre-med (good scholarship), but could have gotten into a much better school if I was pursuing finance as a major straight out of high school. Wanted to get some advice to see what my best option would be if I was going to make the switch? Not sure if I should change my major this late into the game, or wait and get a MSF or MBA (fairly confident I can do well enough on the GMAT to get into a top business school for a masters)? Oh, also forgot to mention, my dad works in the industry and has some connections I might be able to use for internships and things of that sort. Any advice would be much appreciated as I am a little lost on what to do. Thanks.