My pump won’t pump!

Ellie • Engaged to my soulmate💏and newly a SAHM to a 8 year old boy 👶🏽 4 year old girl and my newest baby girl born 1/25/18👶🏽👶🏽🎀🎀 💕

So I have a spectra s2 but lately it won’t get like anything from my boobs when I pump after nursing!

I can hand express and milk comes out so I know they’re not empty.

It feels like the pump won’t go fast enough or hard enough for anything to come out

Has anyone experienced this?