Yep... that could do it. There's a condition known as honeymoon cystitis caused by frequent intercourse but unless you develop further symptoms of a UTI, I'd wait and see if a few days of abstinance might help.

Contact your doctor if any of the following develop:

Signs of a UTI:
* Bloody or pink-colored urine (hematuria)
* Changes in urine color
* Cloudy urine
* Dysuria (difficulty urinating) and urinary retention
* Foul-smelling urine
* Frequent urination that often produces only a small amount of urine
* Painful urination
* Urgent need to urinate

Signs of something worse happening in your body:
* Abdominal, pelvic, or lower back pain that can be severe
* Fatigue
* Fever and chills
* Loss of appetite
* Nausea with or without vomiting
* Night sweats
* Pain during sexual intercourse
* Pain in your groin or side
* Redness, warmth or swelling

I hope that helps.