I always heard that you produced more milk in the morning, I think I read this in a pamphlet from the hospital. So, what I did was in the mornings, I would always feed only on one side and then immediately pump on the other side. That way, I would always start the day with an extra bottle. Also, you have just been doing this for 11 days, the more you feed, the more milk your body will produce. Your body will keep up with the baby's demands.
I also read somewhere to increase your milk supply, take a weekend and feed every 30 minutes to 1 hour, the stimulation increases supply.