Hi palak ,

Time management is the most crucial part of jee most of the candidates get messed up due to time issue the pressure in real exam hall would be 10 times more than your test series so firstly work on your speed how can you during your practice time at home set timer to solve questions everyday set 30 questions to be solved within 1 hr it might take more than 1hr at first but at last you will acheive your target. And for forgetting every thing its just your pressure I ask you one thing if you dont get the wright answer what would you loose nothing so why to fear might you wont get cse in trichy but you will get cse in any other nits chill . 

Hope it helps!!!