My English exam are around the corner, and till today, i am still struggling to complete my essays on time.
During the exam, i am given one hour and thirty minutes to complete a piece of situational writing and an essay.
I will have difficulty in writing if i lack the vocabulary and ideas, which happens almost every time.
So i might spend about thirty minutes on the situational writing and an hour on the essay. With the anxiety and stress that i will face during the exam, i just can not produce a decent piece of writing.
I realise that i take a very long time to think, resulting in loss of valuable time.
I will be sitting for my GCE O level examinations this year :/
Any tips or guidance?

Thanks alot!