If the condom broke, then there would be an increased risk for an STD. In addition to the urinalysis which you had, I would also suggest testing for STDs such as gonorrhea or chlamydia.
You should also ensure that the pre-ejaculate is not in fact some sort of penile discharge, which also can be suggestive of an STD.
If those tests are negative, I would consider a prostate examination as the next reasonable test. This can be performed via a digital rectal exam. If imaging is needed, a transrectal ultrasound would be the test of choice.
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.
Thanks,
Kevin, M.D.