I Have To Have Back Surgery, As Was Told To

I have to have back surgery, as was told to me by two surgeons and they have already done 2 sessions of epidural in my back, now they want to do this in the spine! How much do I have to go through before surgery? I have great difficulties walking as I do sleeping. I have asthma and am having a little problem with my breathing today. I'm not sure if it's the asthma or possibly my back pain causing it. It's been quite a while since I have had a problem with my asthma! Thank You.