Have you got your USG scanning of abdomen and pelvis? Also get your Urine checked ( urine routine) for infection. Without reason cannot treat properly.
Reasons could be
1. Infection
2. Stone
3. Some growth or tissue etc obstructing the flow
4. Uretral patologies
Etc.
Home remedy you can try
1. Ushira root in water
2. Barley water
3. Tender coconut
But without full information difficult to assure you
Next Steps
Get Lab tests done and consult
Health Tips
As per your age do get a blood routine done.