Numbness & new medication

Hi, I have been diagnosed with MS since 2009. I had been on no medication for the first 10 years until I had went for an mri and there were lesions showing on the brain, I was effected by numbness down the left side which never came back. I was put on avonex injections which were going very well for me.

I had noticed lately that my left foot and leg had a slight sensation so went to a&e, they put me on a 5 day Iv drip and 5 days then of steroids. I had got a mri done too which showed new activity on the left side of the brain.

I still didn't get the feeling back on the right foot or leg? Will it come back, would like to hear from other people?

so the neurologist is suggesting putting me on a monthly infusion which I am terrified about cause of the bad side effects.. ie brain infection... I would like to change to copoxone from avonex but neurologist suggests a stronger medication. has anyone else changed from avonex to copoxone? what was their experience?