Thanks for your query. Based on the facts that you have posted it appears that your prostate
size which is 20cc is near normal size. Most likely your symptoms are due to chronic Prostatitis
.However this can be confirmed only on Clinical and Digital Rectal Examination
(DRE) by a qualified Urologist
. Pleas consult qualified Urologist to confirm the diagnosis and further treatment.Do not worry it can be cured by taking appropriate antibiotics.