Enervated.

I am completely exhausted, enervated. Can't barely get out of bed in the morning no matter for how long I have been sleeping. Days at work are hard, very hard, I don't have the streangth. At the moment it is a bus strike as well in entire Stockholm. Which means that I'm walking or taking the bike to work. I don't have any streangth to do anything after that walk/ride. It's nothing - 30 min walk/15 min ride. What's wrong?