Not responding to pump help!

Da

So we need to start letting other people put my daughter down for naps so I need to pump to give her milk in a sippy cup. Today I tried pumping in the morning and couldn’t get a letdown with the pump. I could feel milk in my breast but i only got about .5 ounces from both breasts combined. I tried looking at pics of my daughter, pics of her breastfeeding and even watched a video of her breastfeeding which didn’t help at all. Any other tips or tricks to get my body to respond to the pump??

Just a quick note... I have pumped before when she was a newborn and usually got an ounce or two. The most I’ve pumped is 3 ounces from both breasts combined but it always seems to be hit or miss whether it works or not and I can never get more than one letdown.