Pumping

When did you ladies start producing enough milk to make pumping worth it, my LO is 5 weeks and breastfeeding A LOT. I started pumping once a day last week. I'm getting between 1-2oz when I pump. I'm trying to stash enough milk so my husband and I can go to our company Christmas party December 12th. I return back to work January 15th, so I will need a stash when that happens. I need HELP!!