Hi Fried, welcome! I haven't experienced such a side effect with Clomid (I just completed my 2nd round too), nor heard of others who had. How many days have you had the foul smelling urine? Could it be something you've eaten/drank? I know there were some vitamins that I took before which led to foul smelling urine too.
I just got back from HSG - it wasn't as uncomfortable as I thought it would be. Radiologist said that my tubes look good, but the detailed report will only be out this Sat when I see my doc.
So now I'm wondering, I have no blocked tubes, any possibility of hostile CM will be addressed by the IUI, what else could there be? Short of doing a laproscopy, which I'm not very keen on, the only other theory I can think of is that the IUI was done too late after my ovulation (about 45 hours after HCG trigger). I have to ask the doc about that this Sat as well....really hope this cycle is THE CYCLE!