7 weeks pp, pumped 4 oz... Normal?

I've been going back and forth with the idea I'm not producing a lot.... Or enough. My LO is constantly eating and everyone says "she's growing" but I don't think she's eating enough in a feeding. She only nurses one side and doesn't have patience or some for both.

I'm a FTM at 7 weeks pp. It's 11:40 am and I just finished pumping for 15 minutes. It's been 2-3 hours since my LO nursed. I got a total of 4 oz (2.5 and 1.5 oz from each side).

Is that a normal amount for 7 weeks?

Any suggestions or comments would be appreciated. Thanks!