Why am i breathing through one nostril? it's making it hard for me to sleep, and depending on which side i lay one it will go to that side of the nostril.

the answer is:

i had an assignment in the biology course where i should write a few paragraphs about an experience. the teacher didn't give us a rubric. if i had one i could have paid closer attention to the criteria that has the highest scores. this could have improved my grade.

hope it !