Can someone check my grammar please?

I feel somehow nervous these days.I guess it's the result of getting closer to the final exams....there is are so many things to learn and I feel there isn't enough time to get well prepared well. 
I'm a computer student and I like my major especially programming and networking studying computers and I like programming and networking the most ,unlike the electronic courses.I feel that spending time on such courses is a waste of both time and energy.I don't think if anyone expects me to know how to solve circuits as a network manager or even a programmer,except for the case I want to write a program to solve them, which is has  already been written!

Can someone check my grammar please?

Somehow, I feel nervous these days. I guess it's the result of getting closer to the final exams. There is so many things to learn and I feel there isn't enough time to get well prepared.
I'm a computer student and I like my major, especially programming and networking.  I dislike the electronic courses. I feel spending time on such courses is a waste of both time and energy. I don't think anyone will expect me to know how to solve circuits as a network manager or even a programmer. In case I want to write a program to solve them, it would already be written!