My son is 8 weeks old today; I'm still swaddling him in the halo sleep sacks. We have three of them in the newborn size and he's about to grow out of them. He really doesn't seem to care for being swaddled, but once the fight is over, he sleeps sooo much better. I've tried putting him down flat just in pj's, but his arms and legs flail about and wakes him up. Has anyone had their baby grow grow out of their startle reflex this early? Or should I go ahead and buy another sleep sack in the next size up? Any other sleeping suggestions much appreciated!