I'm currently on antibiotics for uti and still in pain after 4 days. will @home uti test give me valid info, or do the antibiotics invalidate it?

Urine recheck: You should follow up with your doctor for a urine recheck and culture. Your urine infection may be not sensitive to your current antibiotic and you so you may need a different one. A culture and sensitivity check of your urine will check this. Also if your urine comes back clear it may be your discomfort is not still due to the uti but some other infection or problem.