My Problem.............

M y biggest nightmare when learning English is understanding about Grammar because I thought it was very complicated and difficult. And I have to be careful or pay attention when use like verb, pronoun, adjective , singular or plural and the pattern of the sentence, if there are less then or missing the sentence would be wrong.And also pattern change of time such as from simple present to simple past tense. And this often makes me scared,dizzy and confused. And then Speaking because I am shy when I have to speak in front of audience or class and also I don't have self confidence and this is my biggest problem.