Translation of noción

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.
She even compares the hills across the station with the belly of a pregnant woman by saying that they do look like white elephants. Maybe she thinks that way but I am not really sure about that.
Sorry for bothering you with so many questions. You are going to be my first online language course. The more I trust you and your website, the more I will use it and recommend it...No problem...