Ill-fitting hiking boots — anything I can do?

Hi everyone!

I’m hiking the Salkantay in a week, and I began wearing my new hiking boots (Womens Oboz Katabatic) around in Cusco, and now I have blisters forming on my pinky toes from the shoes being too narrow. I had worn them on a hike a couple months ago and everything was fine, but I guess the elevation and more consistent walking has swelled my feet?

Is there anything I can do?? I was thinking of preemptively putting on bandages where I know I’ll get blisters. I’m so nervous about doing the hike now (it’s my first major hike), and I was wondering if I can do some parts of it in my sneakers?

Thanks so much😭🙏🙏