Thanks everyone.

Barb, Im using a medela swing.
Im currently feeding DS2 before work (becuase hes getting up at 5am) expressing twice a day at work, b/f him for his last feed and then expressing once before I go to bed.

So depending how much I manage to express, some days he has 3 ebm feeds and others he has a mix of EBM and formula.

I think its like BG said I just really thought we could b/f longer this time, I had not planned on going back to work this soon and really wanted to b/f for 9-12months