Can't disagree with any of what Em posted from Jack Newman! Fluids so inflate weight and are rarely taken into consideration.
Often it does take a little longer for the change from colostrum to milk to take place after a c/s as mentioned before because you haven't pushed a baby out. If you're still producing colostrum, as others have said, rather than pumping switch to hand expressing. You will most likely get more out as there is skin to skin contact that a pump doesn't give (albeit your own skin!)
For what it's worth, to have got out 10ml of colostrum is AMAZING! I managed 2ml after my c/s with DS and was mortified until I found out that was actually plenty for him.
Another tip for feeding a sleepy baby is stroking their cheek upwards from the corner of their mouth towards the cheekbone. This actually stimulates the suck reflex, so will get them sucking again even if they're asleep.
Also presuming (perhaps inaccurately) that you meant 2oz lost rather than 2lb