Bad back pain after antibiotics finished

Hello, 

I had a UTI for which I finished my antibiotics. During the antibiotics treatment I developed bad back pain, at times so bad I could not walk straight. My lower abdomen also hurt. Now I have finished my antibiotics and the stinging whilst peeing has gone away, however my back pain remains. It is so bad that I can't really do much because of it. Whichever position I take it hurts.

I have read about it spreading to the kidneys however I have not had a fever at all. But it seems too coincidental that only now should back pain develop while I have done no exercises etc to cause it .. 

What should I do? 

Thank you

I would probably get some urinalysis dip sticks and test my urine to make sure everything was normal.

With my UTI's I didn't always have the burning when voiding, but still had a UTI.   Is the back pain where the kidneys are?  

Thank you for your answer, I just got released after staying in the hospital for several days. It turned out I had a kidney infection

I'm happy to hear you found the problem and had it treated.