Did my houseguest notice me when she was sleeping?

So I was in the basement watching anime, and I had to use the restroom, so as I was walking completely silently, I had only gotten to the back of the couch (she was sleeping on the couch) when I heard her make a sound. Of course, I was behind the couch, so she couldn't have seen me, especially since it was pitch black (other than my iPhone on lowest brightness pointed at the ground). Do you think she noticed I was there? I Really NEED TO PEE.

If she was sleeping, then she did not notice you.

Umm why does it matter? >.>