I have had high white blood count for 7yrs, i am losing wieght, film test have been done and cat scans with no diagnosis yet, feeling tired and down what could be wrong?

See a hematologist: There are too many possibilities to list in this type of forum. You should be seen by a blood specialist, also known as a hematologist to determine what might be the problem.

Flow cytometry: Has someone reviewed the peripheral smear. If more lymphocytes, consider having peripheral flow cytometry done. Need to have someone look at your blood under the microscope. Hope this helps.