Trying to start back

Since the Louisville Marathon Oct. 19, I've had some health issues that have backtracked my training and racing. My back has been giving me some problems along with some severe headaches and a few other more minimal issues I've encountered. I had an MRI on my head and lower back and they showed that I probably have a cyst on my brain along with some other more complicated problems, and my back has a few bulging discs, one that is pitching my nerve, and I might have some other problem that is a little more serious that I'm not that familiar with. I'm going to see a neurosurgeon this Friday. As you can tell, I'm a little banged up.

With that said, I recently bought a treadmill (which I've been wanting for a long time) and I'm going to start back running and continue running until a doctor tells me I shouldn't, which they have yet to do. But I am cutting my mileage, not running as many days per week and doing most of my running on the treadmill, which to me seems like less strain on my back with the even surface and no twists and turns. I'm not sure what (if any) races I'm going to attempt yet but they will most likely be low-key races around the area. If I get in good training and a few longer runs, I might attempt a marathon in early spring. I'm not sure about that, though. I guess I will just have to wait and see how it all unfolds.