I found mine fine, really. Didn't hurt too much. They inject die into the uterus... and you roll to each side while they try to push the dye through each tube. One of my tubes spasmed shut so they couldn't get dye through it and the pressure hurt a bit. But it went away very fast.

I've had heaps of dildo cams but I felt really exposed for this procedure.

You can be more fertile afterwards if it unblocks a previously blocked tube (sometimes the blockage is just mucuous and it can dislodge that).