Burning when peeing so I did an at test home kit and it was positive for UTI what should I do but I have cystitis so I don't know which is causing it?

Consult doctor. UTI is not a do it yourself illness. Please consult a doctor for evaluation and proper treatment sot that infection does not affect the kidney.
Here are some ... See Doc soon & receive antibiotic Rx timely. Meanwhile, go to see urologist timely to make sure of no modifiable underlying causes for recurrent UTI as well as to design a regimen of long-term care so to minimize UTI-related morbidity. Note: Seek urgent care whenever becoming feverish...