I had a heart attack 2 weeks ago, and had 4 stents put in. I am schedule for multi bypass surgery in September. They told me that I should start to slowly walk after 2 weeks since the heart attack, but I just don't have the wind or the energy to walk. All I do is sleep. I'm 64 years old, and prior to the heart attack I had more energy than this. Is it normal for me to be so very tired after 2 complete weeks of total rest and sleep?