Had my surgery 10/26 and I too am at week 4. I only lost 2lbs. in this week. My biggest shock was the amount of pain I was in. I generally have a high tolerance for pain but this was terrible. It's much better now, only minor aches and pains when I bend or sit too long. The constant soreness is gone too. I also am having trouble staying asleep at night and wondered if anyone else was having this same problem. My surgeon chalked it up to my metabolism changing as well as hormones, but I am ready to get a full nights sleep!