It may be possible to obtain prostatitis from oral sex. I would be tested via a urine test or urethral swab for STDs - specifically gonorrhea and chlamydia.
Further evaluate of the prostate can be done with an ultrasound or prostatic massage. Any fluid that is expressed can be sent off to the lab for culture and analysis.
These options can be discussed with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_b