Pain in urination as u described points more towards honeymoon pyelonephritis .
Many people suffer from this condition specially after first few sexual intercourse ..
Next Steps
* Use barrier contraceptives like condom to prevent STDs, unwanted pregnancies
* maintain a proper hygine of vulvo vaginal area
* avoid excessive washing/ soaps .. as it can cause more dryness and itching
* maintain hydration
* If it is associated with fever , blood in urine then it might require a course of antibiotics and other medicines