You're only 5 weeks out from takedown? Hah! All these symptoms you describe might be attributed to the illness prior to surgery, plus the surgery. I don't know how ill you were before surgery, or if you were on prednisone, but it took me a full year post surgery to get my energy back! It's a great idea to get a CBC to check for other causes but don't rule out this being normal recovery.
Patience will be your best friend for the next several months.