where's my milk?

i meann, where is zara's milk???
it has been two days....
my expressed breast milk is sooooo little...
im so so freakin worried...
usually i managed to pump 5-6oz of breast milk per session...
now its only 2-3oz.... half of my normal milk supply..
what's happening???

have i been eating too little?
am i secretly stressed out?

i dunoo... mayb i am... God please help.
I wana feed my baby...