Reasons for lymphocytosis are numerous.
At your age and looking at history unlikely it's CLL or lymphoma.
Next Steps
Peripheral smear to see morphology of Lymphocytes. If peripheral smear is suspicious of CLL (Very unlikely in ur case) then to do Flowcytometry test on blood to see clonality to rule out CLL.
Answered2022-10-14 03:46:08
Let others know if this answer was helpful