I am a female on Flomax (to try and speed the release of a kidney...

I am a female on Flomax (to try and speed the release of a kidney stone). I've been on the medication for 4 weeks and my arms (including my hands) and legs have become very weak and tired feeling all the time. I feel dizzy most of the time, due to Flomax causing a blood pressure drop, which also leaves me freezing (even in 90-95 degree weather). I now have begun to feel nauseated and can't stand the thoughts of any food whatsoever. There has got to be another medicine that can do the same thing as Flomax without all the side effects.