About ready to give up.

Mila
12 days PP and i had made amends with potentially always having to supplement my baby's meals as my milk is not enough to keep him satisfied. However, today after what I thought was a successful  morning feeding (no top up) my little guy has had to be given almost his full meal in formula because he was still hungry after being BF for almost and hour.. I switched breast almost every 20 minutes and unlike other feedings were when he pulls off i can see milk in his lips... i could see nothing.
My breast feel so empty and when i have tried pumping to increase my supply, i can only get an ounce and it seems i have nothing left in me to BF him with. 
I feel so bad for him because feeding him has become one of the tasks I am starting to dread the most.  And  instead of bonding, I feel it's doing the opposite... Any words of encouragement are welcome.