I did that in year 11 too...would spend an hour on one part, 45 mins on the next, then had like 15 mins to write a whole essay.
By the time you get to the HSC, you will have English exams timing down to a fine art. Belieeeeeeve me!
Practicing in time limitis is absolutely essential in English. Unless you are an extraordinarily fast writer or manage to write VERY succintly, you will never get the timing right in the exams unless you have done a shitload of practice at this. So get ready for many times of sore hands ahead! Yay!