What;'s today? Could be a very shame DAY for me!

What a shame to myself! Guys, I had made a really silly mistake which i cannot forgive myself still. The problem is happened this afternoon during the microbiology tutorial class..my tutor ask us to call out the answers to him (it's actually a homework that we have to do for week 4) and no one of us in our chinese group want to answer to him. So, i pull down my face to answer "Fluid accumulation" BUT i pronounced "accumucation" WHICH is totally wrong pronounciation. Yet, i pronounce it for 2 times as the tutor can't listen to my voice clearly. GOSH, again, i made a mistake again! I know it's wrong but..i am nervous at that time as well as i am speaking too fast so my tongue cannot turn in good position (or what i want as in pronounciation). I look at my question paper straight after that because i know i am wrong! and i hope the others can forgive my pronounciation! arh!! Whar a shame on me!