Tiredness 9 weeks post surgery.. is this common?

Thanks so much to each of you for sharing both your experiences and suggestions, I really appreciate it. 
I wish I had joined the online network sooner, it is a relief to know others are experiencing the same and now I can be more accepting and relaxed about my current state. Even so, I am going to go ahead and have a blood test to test the iron levels a couple of you have suggested. 
Thanks again.