Too late to breastfeed ???

Alexis
Is it too late to breastfeed?? My baby is almost 3 weeks old and has been bottle fed. I didn't breastfeed in the hospital because there were some complications and I wanted to try but couldn't and now I'm feeling better but I don't know if I'm producing enough milk or its all gone now ?? She latches on but only for a bit so I feel like there's not enough milk.