My left side was my super boob, DS didn't like the right side as much, always fussed and fed mostly from the left side. I never felt let down on either side and never really ever felt full. DS was exclusively fed until about 5 and 1/2 mnths before we introduced solids and was a really budda baby I fed him until he was 2 and 3/4 before I weaned him (he was night feeding only at that stage and I had had enough by then )

So as long as you keep feeding DS (which I am sure you are ) that you will keep producing milk. I did find when DS when through developmental leaps (both physical and mental leaps) or was sick and would feed more often that he would feed from both sides and seemed to increase the supply in both sides, I could see how when he would demand more I seemed to produce more even if it took a day or 2 to catch up.