Breastfeeding and pumping

Okay ladies my baby boy is three months. And ive been wanting to start pumping more to help increase my supply as he is a piggy and just eats and eats but sometimes i feel like im not producing as much so i was wondering if any of you that are breastfeeding and pumping what are your schedules like? How do plan when you pump? Ive been trying to pump when he's asleep but i worry im not going to have enough to give him when he wakes up. Thank you in advance to anyone willing to help.