My exculsively BF 5 month old hasn't gained any weight since his 2 month WBV. He was just under 13lbs at 2 months, and now at 5 months he's 13lbs 8oz. His output is normal and he is exceeding milestones. He has started sleeping for 12 hrs at night, with only one nursing session between then, and during the day he nurses about every hour. They actually weighed him 4 times on 2 different scales because it just didnt seem right. Honestly I didnt have any concerns about his weight gain because he seemed like he was gaining but now, I'm left wondering if everything is okay. His doctor wasnt concerned about it as everything else is great. Has anyone else been in this situation? Could he be just adjusting to the longer night stretches now? I just cant believe he is only 13lbs! Should I be waking him at night to eat?