Back pain & leg weakness. For 2 months?

Hello Doctor I was working earlier from home and due to long sitting hours I got severe back pain which was going to my left leg, so I consulted a general physician doctor locally and got the MRI done for back in July last year and MRI was normal. The doctor suggested 2 medicines which I took and back pain gradually reduced. Now again I have got back pain and leg pain , numbness and vibration like feeling in the knee back side and back . again I consulted another doctor and he suggested Gabapin Nt medicine for 2 months. Pls suggest if gabapin nt is good for this type of problem. I don't like the feeling which I get after  taking this medicine. I feel like I am getting unconscious. Pls suggest if I can continue taking this medicine for 2 months?