Fatigue

Oh yes I am very fatigued still. I can barely shower and after I do I have to sleep. I'm just worn out all the time and still sleep a lot. I'm laying in bed all day except to do short walks, get food, and use the restroom and maybe get a shower in if I feel like it. I just don't know what to do to build my energy level back up, do I need "endurance training?" If I do more than short walks, max 10 minutes, I get super sore and the soreness lasts a long time. I'm just so confused as to what to do to get more energy. My surgeon said to do what I can but don't do any more, when I get sore stop, when I get tired stop, so I'm not able to do much at all.