Pumping at work

Hey ladies- currently pumping at work and I barely get 2oz at a time,I cannot relax enough. I try looking at pictures of my baby to see if that helps but it doesn’t. I feel pressure to get it done in the amount of time they give me and “when my pumping is scheduled” (I’m a toddler teacher so I need coverage while I pump so my pumping is all scheduled. Once i get home I have no problem pumping and getting more milk. How do you all relax at work while pumping? Any tricks?