Verb conjugation of "feststellen" in German

I fell asleep but woke up in the middle of the night. My stomach turned upside down and I could not hold myself anymore. I needed to vomit and ran to the bathroom. This occurred three times.
I was a little confused because I recognized the voice and I had booked at Luisa's guest house. She explained me that she was sharing the phone with her neighbor and her neighbor was not honest.
We changed to another room which was slightly better and stayed there one night. The next day we moved to another room again before finally leaving for a better hotel. It was important to stay in a good place.