Almost about a week ago, I went to the ER because I had no control over my bladder one night and when I went to the bathroom a lot of blood was coming out. I am 19 years old, female, and I’ve dealt with UTI’s all my life. The doctor told me I could have a kidney infection based on the symptoms. He prescribed me Cephalexin for 10 days. The bleeding stopped and the pain after urination. I decided after day 4 to switch to Macrobid and it is day 3 and I still have mild urgency. What do I do?