Sonohysterography (saline ultrasound of uterus)

Okay so last month I had a Laparoscopy and Hysteroscopy and was told by my doctor that my septum was larger then he thought per theultrasound. The last time we spoke we discuss having to go back for another Hysteroscopy to complete the septum removal.  I've been waiting for my period which kinda started's really light so I'm not sure how it's going to go but lots of cramps :-( we were going to just do an vaginal ultrasound but now the doctor wants to do a Sonohysterography...this is when the inject saline into your uterus to see the inside of the uterus.  They want to see if we can get away without having to do another surgery which I'm very thankful for but I'm a little nervous about the procedure. The nurse did mentioned that I will experience a lot of cramping after the procedure. If you've had this procedure done before can you tell me how you felt before and after. I would really appreciate your feedback!