Ok so OP it is getting down to the wire. You are between Dartmouth and WashU. Both are fine schools and congrats are in order. You rec’d many great acceptances (Duke, UNC, etc).
From your posts I am assuming you are first gen college student? It must be stressful navigating all this on your own if your parents struggle with paperwork.
If you plan on going to med school you want to keep loans at a minimum. Time is of the essence and personally I think that you could benefit from posting your financial aid packages. The pell is a factor yes but I am confused about the differences between the two schools. There are many posters here with experience with finances and financial aid! Take advantage!!
Wash U :
Tuition, fees, room and board ____
Health insurance? ____
Net cost: ______
Grants _____
Subsidized loan _____
Unsubsidized loan ____
Amount needed to come up with: ____
Now do the same for Dartmouth.
Personally I would put aside transportation and work study for the moment and look at them at the end, once the other numbers already figured out. Again, other posters have a lot of experience but this is my suggestion, for a start.