Milk supply pumping and nursing

Kathy
I'm curious how am I suppose to pump every 2 hours if my child eats every 2 hours ? And when she is sleeping and I try to pump it's like she hears it wakes up and I have to nurse her right away then when I try to pump after nursing her I get nothing out but a few drops literally like 6-7 drops that's it and I end up tossing it because there's no way I can store it ! Any suggestions or advice would be appreciated TIA !!