HSG Test

Going for my first HSG tomorrow. My doctor prescribed me antibiotics and told me to take a pain med 30 minutes before the appointment, so I got that covered, but does anyone have any other advice or comments about what I should expect from personal experience? Any tips to prepare, or anything that helped after? I've heard some people say it was like a pap with a little more cramping after, and then I've heard some people say it was awful and incredibly painful. I guess we'll just have to see how I react. Any advice would be greatly appreciated though!