UTI advise

So I posted before.....On the 10 of this month I had back pain then tuesday frequent pee ing went to the doctor thursday or wensday.....I am taking the medicine the doctor provided but I am still feeling like I NEED TO PEE my sister says it normal to feel like that; this is my first UTI and I am freaking out. I still pee constantly and I think because all the liquids I am taking

I have 3 more pills left of my antibiotic should I feel back to normal or can the UTI still lingure???? Like I said this is my first UTI so IDK what to expect any advise and yes the doctor gave me the pills to help the discomfort of urniating but I finished them all