How inspiring! Your "stubborness will get you through" thing is right on. It might be helpful to incorporate a power phrase into that. Mine is "you got this!" I say it out loud to myself when I need a push. I also like to visually redecorate my apartment on long runs. That takes about 20 minutes when I let my mind go. Just lean into the mental part and ignore the physical completely. i believe you will crush this thing. Get it, girl!