I’m a nursing student in my last semester, and I have 12 hour clinicals in the ED and ICU at a level 1 trauma center... I start tomorrow and I am so worried about being on my feet for 12 hours 😬

Any tips/tricks to staying hydrated/snacking & not killing my back? I’m 19w5d and my back is already killing me. I did clinicals just fine from conception-14w last semester, but it was OB clinicals so they were super low-key and everyone was really understanding about me being pregnant. Hoping I’m just psyching myself out/overthinking it. I tend to be pretty good at that 🤷🏻‍♀️😂👍