How stupid is this? ?

i worked so F***ING! hard on my science project which was due today!!!!!!!! i worked so hard last night to put my diagram together... i walk to school(28 blocks by the way) carrying my heavy materials needed to present my project today after school! i get there with my arm in so much pain. I leave my projects where everyone else does and then when its my turn to present my project MY WHOLE DIAGRAM IS MISSING! i told my teacher about it and i told that stupid B**** that i did everything and i worked so hard and that it was here. SHE DIDN'T BELIEVE ME! AND ON TOP OF THAT, I AM NOW GIVEN A 65 FOR "NOT HAVING MY MATERIALS" WTF! i mean i worked so hard to make everything perfect and then mysteriously my project at the split second that i was about to present it, dissappears! today has been the worst and i'm sorry for my language but i've never felt so stressed in my life! High school is so much work. i am trying to maintain a 90 average (but its an 85). today is just one of those days!!!!!