Gosh.... Please have mercy.. Why twice?

Twice! not once but twice! My lesson for one of my classes was a total disaster. Every single thing just seems to go wrong! Yesterday, the LCD failed me and today..... OMG, my speakers failed me! I am so so frustrated with the day! With the speakers failing me, I had no choice but to sing! OMG! OMG!!! I was totally going to faint..... My voice sucks and my students were giggling when i started singing! Some did cheer me up, thanks for the support girls, but some couldn't help giggling! I didn't mind them giggling at me because I truly know my voice sucks! Well, that's just the beginning of the lesson....... Following that, the temperature in the class was rising rapidly! It so so so hot in there as the students were not supposed to switch on the air conditioner. A computer room without air conditioner? Gosh.... it was boiling hot.... i sweated so much that my students even realized that..... I went through the lesson briefly as is realized that my students were not paying much attention towards the lesson.... Sorry girls... i tried...... I am sorry i failed.... Instead of dwelling much into the lesson, I talked about life, making decisions, just like in the poem in the lesson.... well, I hope some listening...... Thanks for those who supported me and encouraged me...... thanks again girls... in the end, I decided that this lesson has to be done all over again.... and well, I guess that's how it would be..... In the future, I will very likely choose to do my lessons outdoors... fresher air and better ventilation........ so sad... not once, but twice!!!