There was the baking soda and water solution that Able or Raster suggested to me. I tried it and think it helped a bit. Other than that, urinate often and make sure you don’t stop in the middle of urinating. I feel your pain, I had the same thing a few weeks ago and the burning was so bad that I was in tears.
Angor, have you tried taking Azo to at least get rid of the pain and urgency while you deal with actually getting rid of the UTI?