Stephanie,
You seem to work quite hard and I was wondering how you feel after taking one day off?
Have you done much experimenting with actively regenerating yourself as your " go to" training seems to be always… more not less.
walking for 1.5 hours and then doing hills the next day makes me tired thinking of it.
I am just curious as I know school is a large component of your day to day lifestyle so perhaps you need more exercise to compensate for a great deal of sitting?