Rehab hurts sometimes...

I started not so long ago and the first couple of days were hell. My legs were so sore that I could barely walk. I'm not sure how long it will hurt until it doesn't. I'm scared that I won't be able to run anymore. Damn my knees. I feel like a weak branch that wants to snap. But alas, I can't give up. I will feel like a coward and a hypocrite if I give up. Tonight is another regiment of my work out. I guess I'll see how this session goes.