Amir,
As I see it there are two ways to go.
1 Find a new provider who has more challenging questions and use these to give you more confidence by using exam level questions. Bionic Turtle have questions much more challenging than Schweser, but they are not multiple choice and there is not the volume you would have from Schweser.
2 Stick with Schweser and drill the questions until the Schweser test bank is second knowledge. this is whatI did for the exam. By the time I got to the exam I was completing 100 questions in way below the time limit and with good results. When I got to the exam whilst I certainly found the questions more complicated the command I had of the material from drilling questions allowed me to work out what was required, and the speed I had on the simple questions allowed me more time to think.