My LO has been napping for a good 3 hours now but my husband is coming home in about 20 minutes and we are going grocery shopping when he gets here. So I know my LO will be hungry when she wakes up (probably at the store) long story short. I pumped so that I could feed her and from both breasts I only got 2 oz of milk. Will this be enough to feed her? She's 4 weeks old