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We responded to this on your other comment. Please kindly check.

But to add to that.
Work on your overthinking, consider delegating things and create your sleep time that nothing else should tamper with

OK but I can't creat the time of my sleep it is difficult for me because sometimes exams night, I'm not sleep in these days

Oh you being a student means you need to sleep health. Sleep helps to consolidate memory.

yes but I don't complete my sleep. OK I will try it