OP here! I had the IUI and it was, as everyone said, surprisingly easy. I did the box breathing suggested by a PP (thank you - will try that again), AND took the Ativan, AND brought my husband. Like I said, I'm a baby. But now that I have experienced it, next time I know it'll be less of a production. That is, unless this time worked. We shall see!
Thanks for all the sweet and helpful comments!