Bullied

Why is it that I feel so easily "bullied" by medical professionals?  It feels like you HAVE to do what they say.  I called the pediatrician to make an appointment to talk, but the nurse tried to convince me I didn't need to see her, but just needed to reschedule the upper GI.  I ended up just saying I needed to talk to my husband about it and now I have to call back to try to make an appointment again.  Ugh.