Welcome to HCM and thanks for your query.
Since infection is partly treated, urine may not grow anything.
I would treat you this way if i were to---
1. Low dose antibiotics in half the dose for 3 to 6 months.
2. Medicines called anti-cholinergics to reduce the urgency.
may or may not be related and a physical examination should answer this query.
This is a treatable condition and there is nothing to worry.