Did you have serious oversupply problems with DD1? I think that as Barb says you are better generating a typical month-old-baby supply now if you can (i.e. working towards 1 litre ish a day). If you end up with a huge excess then you can try pumping less often (I mostly expressed for my DS when he was a little baby and got over a litre in 4 pumps a day - but I had a monster of a supply). Oversupply per se doesn't make problems as long as you are not getting engorged - it's just messy. Undersupply on the other hand is much more of an issue.