i was sent for an abdominal ultrasound due to gallblader issues and during one of those they discovered that i had an ovarian cyst
sometimes when they are looking around they come across things that were not expected and end up looking around there too, i think that is probably what happened with you as well
that being said, if you are uncomfortable at any time with whatever is happening you should be able to tell the tech. to explain to you what is happening and why and if you still feel uncomfortable to have him/her stop the exam