I Went To The ER And Was Treated For A

I went to the ER and was treated for a uti - Bactrim for 7 days. 2-3 days later it came back - went to urgent care and now on cephalexin. I have been on the cephalexin for 6 days with 4 more to go. Burning and urgency symptoms are not improving. I used an Azo strip tonight and it is still positive for leukocyte 500+++. Both the ER and Urgent Care took a culture and said they would call if the antibiotic I was given was not the right one to treat the infection. Thank you.