I too had a bad ultrasound experience.

I had struggled to drink the recommended gallon or something of water as it was apparently so important that I should have a full bladder. On arrival, the ultrasound person asked whether I had drunk the water. When I said I had, she said "Well I prefer an empty bladder. Go to the toilet!". She then warned me and husband not to chat as she didn't want to be distracted. It took about 40 minutes for her to get a good look at the baby/foetus's heart, during which time she was very brusque if not downright rude. She kept demanding I go the the toilet, even though I said my bladder was already empty. I don't know whether she had just had a really bad day (we were the last appointment) or had PMT or what, but it was hardly fair to make out that I was to blame for my baby being in a difficult to scan position. At the end of it, all she told us was it didn't look as though there were anything wrong. (Big deal. I knew that already.)

Perhaps I was hormonal and extra sensitive, maybe it wasn't quite as bad as I remember, but it was certainly a far cry from what I'd been expecting. I had some kind of Hallmark-cum-Jesus Christ of Latter Day Saints ad picture in my head. You know, the scene with a nice yellow glow over it, me glowing with health and happiness, husband looking on fondly, finding baby's face and exchanging a loving look, maybe a few tears of joy... Dh didn't particularly want to come but I bullied him into taking a couple of hours off work so he could share this Important Moment with me. All we got was this grumpy woman who made me feel inadequate.

Result - second pregnancy I decided not to have any ultrasounds, and I probably won't next time either.