I have 30 ounces of BM frozen in 1-3 oz portions, using the Lansinoh bags. I had read to freeze them flat for easier storage, but didn't think that 1 oz was enough to bother with that. Now these bags are taking up space in an awkward arrangement - would it be okay for me to thaw them, lay them flat, and then refreeze? Or should I just learn my lesson, deal with these bags, and freeze flat from now on?