I bought my sleep sacks at diapers.com with my credits from other people using my discount code. I don't know how big your DS is, but I got smalls and they are swallowing DD. They are really long and I think they will fit her for at least a couple more months.
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Re: owl mamas
Me: 31, DH: 34, Married 5/29/05
BFP #1: 6/22/10, EDD 3/6/11, DS born 2/25/11 @ 38w5d
BFP #2: 7/27/13, EDD 4/9/14, CP 8/3/13
BFP #3: 8/31/13, EDD 5/10/13, DD born med-free 5/9/14 @ 39w6d