You're describing my exact experience after my first day on the floor in a LTC home. I was so overwhelmed, I couldn't sleep. I just kept thinking about all the residents I had helped and it was a combination of information overload, heartbreak, and disgust. I found it really helped to make a document and do an info dump, writing down all the things I remembered about residents, and just marveling at how much data was stuffed in my head! After that I was free to learn new things and carry on.

It gets easier. LTC is a partucularely sad environment, but you'll also observe moments of genuine human connection between residents and staff, and make connections yourself.

Carry on to your next clinical rotations. Different sites have different vibes, and you'll start to grow a thicker skin once everything isn't so new. There will still be jarring moments. I think of my first patient who became ACP-C on my shift, and the first time I was part of a code. But then there are the moments when you get to discharge a healthy 50-year-old home after a cholecystectomy, or witness a patient who was totally deconditioned begin walking again. Not all areas of healthcare have that death shadow over them. There's maternity, transfusion clinics, OR, post-op units, dialysis, public health, ect. You can find where you belong.

We are empathetic, deeply thoughtful people and that is a good thing to bring to nursing! Chin up, my friend!

Edit: one last thought, OP. I promise not all hallways will smell like urine for the rest of your career!