help I'm drying up

Tiffany • Abby came early emergency c-section. 3/3/17💕 Mommy & daddy are so in love! RIP to my fiancé. 5/21/17 gone way too soon
Any advice on how to get milk production back I was unable to pump for over 24 hours just went to pump and I barely got anything and I'm worried that I'm now drying up and not sure what to do