I've found that once you get to a certain age, the various aches & pains are confirmation that you're alive. Much preferable to the alternative. Mind you, this is just hearsay. Fortunately my splitter (me) can't be run out of oil. It does respond to periodic lube fill-up of ale or red wine, though. After work, of course. Helps with achy bits, too. Best wishes, Dennis.
Not to go into it but I know where you are coming from medically. I am a firm believer that your mental state is what will help you through this set back. Think of it this way each day is a new one and if you can do more than the day before you are healing, no matter how much more even two extra minutes. Also keep in mind that we aren't 18 years old any longer but we are so much smarter. Use your mind and do the least amount of physical labor till you get better and think you are INVINCIBLE again. Hope you fell better with each passing day and when you have a down day think about it and know you should slow down as all good things in time.
Small engine warehouse seems to have about anything one could want. But, looks like I may get by another year. Oil is still cheaper than metal; if only our neighbor knew that...