Sonohystogram

So I recently got recommend to a fertility clinic and have a Sonohystogram scheduled for Wednesday about 3 days before my expected ovulation. I am scared to death to the point of thinking of cancelling the test. I've read reviews an a lot of people say it hurts really bad. I don't think I could handle the pain tbh. Just thinking about it is making me anxious. This is for baby #2 and I conceived my first one naturally. Idk if I want to do this. 😭