It is less likely it is leukemia given a normal CBC. I would also ask for chemistry test to be done as there are other things though that should be checked that might not immediately show on a CBC with those symptoms in the early stages, such as various anemias, and there are a couple of other possibilities too, too many to list, but all treatable. Definitely go back in to talk to your doc as your symptoms need to be thoroughly evaluated to find a treatment.

If your doctor will not pursue this for you, go for a second opinion as your health is not worth jeopardizing. Do what you need to to advocate for you and to take care of you. Wishing you well meanwhile. (((((Blindedbythedark)))))))