Thank you for asking on HCM
Short answer: Yes, it is urinay tract infection (acute 
cystitis).
Detailed answer: Based on your introduction, it is 
urinary tract infetion (acute cystitis). 
In such cases I recommend to my patients:
- Drink at least one large glass of liquid every hour.
- Avoid foods that irritate the bladder: caffeine, alcohol, tomatoes, citrus,
and spicy foods.
- Drink cranberry juice to help fight bladder infections. If you dislike the taste of plain cranberry juice, mix it 1:1 with another juice, such as orange juice.
The antibiotic that I would prescribe for you is 
Bactrim 960 mg one tablet twice daily for five days, and for the pain 
Pyridium 100mg three times daily for 1 to 2 days (this drug turns urine orange, but nothing to worry).
If the symptoms reoccur within 2 weeks of treatment I will suggest a urine culture and an abdominal 
ultrasound.
Kindly rate my answer as helpful.
Dr. Elton