The mild pain and itchiness as a symptoms if experienced by you after an intercourse a day prior, then it is likely that you may have contracted urethral infection, probably a fungal infection or a chlamydia which she may have been harbouring. It is suggested that you may get a urine culture and a urethral swab culture done to rule out any infection with either yeast or chlamydia. The treatment can be directed according to the cause if the reports are positive in form of antifungals or antibiotics for a week during which you have to avoid intercourse till complete resolution is achieved.
I hope I have answered your query in detail,
wishing you good health,
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.