{{hugs}} That's quite a commitment to exclusively pump! Good for you, giving the best for your ds (dear son).
There is some loss in nutrients/antibodies over time, but frozen milk is still preferable to formula, from what I understand.
I always fed fresh/refridgerated if that was available, and then fed frozen, starting with the oldest I had.
This site has some info on storing milk (scroll down).
http://www.medelabreastfeedingus.com/tips-and-solutions/11/breastmilk-collection-and-storage In the chart, "self-contained refrigerator freezer unit" means that you have 2 doors on your fridge (side by side or top/bottom). Some older units had you open a single fridge door, & the freezer was a little box in the fridge itself; since those were open to room air more often, the milk wouldn't keep as long in those. There isn't a column for that type on the chart. Deep freezer means a separate machine.
Hope something in that helps.
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