Felt disappointed

Well, I finish my trial few weeks ago.

My results are terrible, I can't deny that. Fail more than 2 subjects, which make my parents get mad..Not even a subject I got As. I'm so disappointed with myself, I promise my mom that I wont fail my Math and Science during PMR, but I think I just disappointed them.

I really wish that I could study well, but after I touches my books, I would fall asleep although I just read 1 word such as "Maharaja Meiji". Just a word, a word that can put me to sleep..

I'm useless, I disappoint my parents...Everybody have high hopes on me, but I just disappoint them..

Please, if there is someone that could help me. A person that could help me with my Maths and Science...HELP ME!!