C.S.
While you have had some good responses below, it is not entirely true that all fibroids disappear after menopause. My mom had a hysterectomy after menopause last year due to fibroids, as did two of her friends within the last two years.
Please do not be concerned about the ultrasound. As stated before, it's for dianostic purposes, and at this time, you have a ggood chance of being just fine. I encourage you keep communicating with your doctor; your doctor is there to address and concerns you have!
Good luck, take a deep breath, and remember, you will be ok.