Question???? Am I trippin or could the Dr. just have lied because she didn't know but didn't want to tell us that…

Question???? Am I trippin or could the Dr. just have lied because she didn't know but didn't want to tell us that that???....Went to have my ultra sound done for the sex of the baby today. I had already began to feel as tho the doc was really trying to see and find out what the baby was because she kept trying putting extra pressure on my upper pelvic area in different spots as if she was trying to make the baby move other ways than what it was. In which the baby was already very active. Plus it took a little longer than norm. When she finally told me I was through she sat me up and was like ok. My fiancé and I were like ok, so what are we having. The Dr. said it's a girl, I didn't want to tell y'all because I know y'all wanted a boy. So the ??? Is should I believe the doc or get a second opinion?