Does anyone out there use the swaddle me? I have three and my LO is just over 10 lb. The small/med is supposed to fit up to 14 lbs but it's too small for here. The next size up is too large. I hate using blankets as I just can't get it right. Does anyone else find that these run on the small side? Does anyone recommend the swaddle sacks? I am afraid to spend the money and find the same problem?