Just want to share a story from my highschool about that, might help you out.
One of my closest friends, this Indian dude , he did exactly that at Texas Tech, it was a guaranteed admission into med school at Tech after undergrad, provided he maintained a 3.0 GPA.
However, he ended up beingi n a bad situation, he easily maintained that GPA and when it came time to med school ,he could have literally gone anywhere but was stuck in this program at Tech (something to do with credits you earn in undergrad)
Basically what I am trying to say is that if you are confident in your academic abilities and you seem like a typical intelligent upper middle class kid, so I'm sure you are, then don't get into the 7 year program. Odds are you will do well enough in undergrad to get into med school anyways.
Its a very tricky thing, and all this is discounting the possibility that you end up not wanting to do medicine while in undergrad (which is probably not likely, but still) .
Doing "Pre-Med" in undergrad can be any major, I'd rather be a "pre-med" bio-engineering major than just straight up Biology.
Im guessing your undergrad will be in Biology?