When will my uti go away?

Ashley

I’m 19 weeks pregnant and have had a uti for almost two weeks. I started taking Cephalexin Friday night. I take it twice a day for 7 days. It is now Monday, and I am still having pain. The burning has gotten a little better I think, but I’m still having bladder pain. Should I call my dr and have my antibiotic changed, or do I need to just give it a little more time? Has anyone had a similar experience?