Slightly worried

Hello all. New here so please forgive any mistakes. 

Had an abdominal ultrasound this morning and found it extremely painful. Have never experienced pain with a scan before and am little worried why it hurt so much. It normally is uncomfortable during a scan but this was real pain I felt. Person doing the scan wasnt ond of the nicest people I've met which is a shame as most NHS staff have been amazing in my experience. 

Thank you in advance for any help x