Had an HSG yesterday and was so nervous! !! I took 3 200 MG advil 45 minutes before. They had to out 2 catheters in cervix to get a good seal so there was a pinch and pressure there ND a tiny bit of pressure with dye.. I didn't know they had put dye in until he said they were trying to get it to spill. Both tubes spilled! It was painless and over in a flash! !!! I had maybe 2 very light period cramps like an hour later... I attached my butterfly shaped uterus so yall could see :) good luck!

BTW I have a retroverted uterus is y it looks off center :)