I can't walk very well

I started having pain in my back a month ago, it would go down in my behind and in my legs.
I went to the doctor and he put me on steroids which helped it a lot. they recommend i have Physical Therapy

As i started going the pain came back and i started getting balance issues and the pain has come back,
now i can barley walk and i'm scared I just lost my job and i'm trying to get a new one and this does not help.
My legs are very week also my feet are as well
I need to go for a MRI and now they are talking surgery
My question is will i be able to gain my strength back after surgery?