what hurt the most in order were...
1) sonohysterogram #2. HOLY MOTHER OF PEARL THAT THING HURT. I was actually begging the doctor to stop, I was in so much pain.
2) the HSGs - 3 of them.
3) the IUI where it felt like they were trying to bore through the top of my uterus.
4) The first two hysteroscopies
5) The endometrial biopsy. It was a hard pinch but very bearable.
6) The third hysteroscopy. Nothing injected into my cervix to numb it as I'd had the first time but it did not hurt at all;
7) The first sonohysterogram was also very easy.
8) Most of my endless IUIs were very easy as well. Embryo transfers too.
Hope this helps encourage you a bit. I know I am only one woman but have had a few people poking about in there.