Thanks Atomic, I'll take optimism anyway I can get it.
Maiden, didn't mean to scare you about the HSG. Many women have just mild discomfort during the procedure. I'm pretty sure my strong cramping was due to the one blocked tube. If you don't have any blockages, the dye will flow right through.
The radiologist was great and told me to tell her whenever I needed breaks and she'd back off on pushing the dye - I recommend taking those breaks. Also, we agreed to have her throttle the dye to try and push through the blockage. It didn't work in my situation, but it often does.