Hello yen yee.. i understand what you're trying to explain... perhaps, i think it is normal when we nervous towards the presentation. Most of the female in my class they did their presentation not very well, although we are classmate over a year.. i have that expirienced too.. Try to relax yourself 1st... Be nature when you make a presentation... try not to memorize but understand what you want to present.. I used to memorize when i made presentation, but after i observed some presenter who are good in presentation, then you will know what should and should'nt. i understand what are the factors they become so successfully when they make presentation.
the main factor is they know what message they want to deliver to their audiences..
My advise is you try to look for a presentation tips and techniques book to increase your knowledge.
It is good you ask this question. You're trying to improve your presentation skills. All the best yen yee.. If there are any problem, get back to me.. i will try my best to help you. I Like PrEsEnTaTiOn although it nervous me..