Yep, sounds normal. Have a worry free day :)
Hi, I wouldn't worry. When cancer causes the WBC to go low, it keeps going lower and lower.
Since you are steadily low, that might be even a good sign -- because it means low inflammation. That's if somehow you don't have some malnutrition.
If you can't stop worrying or if some symptoms develop, you could ask for bone marrow testing. But then again, if something was really bad, you would also expect low platelets and low red blood cells.
Good luck.