Not wanting to go

My appointment for 15 weeks is today at 2 I called to see if they are going to do an ultrasound for gender and whatnot and the women go bitchy with me. I explained that today is a rare day my daughter and husband are both home and wanting to go with me. She told me I had one at 12 weeks and so I won't get another till 18. They did the one at 12 because the stupid nurse couldn't find the heartbeat with a Doppler because she was too low. I didn't even get tossed the ultrasound or hear the heartbeat then. Anyway they got so angry with me and mouthy it ticked me off and now I don't even want to go. 😕 is this a hormonal thing or do I have a right to be a little upset?