Worried about my supply

IDreamInPink

Hi girls! I am mostly EBF, but DS does get 4 bottles a week while I am at work (part time night shift RN). I will typically only pump while I am at work, but occasionally pump after our first morning feeding. 

I have been getting right at 4 ounces when I pump consistently for about the last 3 months. I guess that's all well and good and all, but I feel like I should maybe be getting more than that by now? I know that my "body will make more as he needs it", but I dont know how the same amount of milk is as sufficient for a 5 month old 15 pound baby as it was for a 10 pound 2 month old baby. 

DS is growing and happy, so I am trying to focus on that as indicators rather that the amount I am producing when I pump. I just kind of thought that I would have more milk by now, especially since we haven't started solids yet.

Thoughts??