Is he teething? We had nfs creep in again at this age with molars coming through, and then again a few months later with canines. I just went with it to be honest, I knew it was teeth making her uncomfortable and she settled so much faster with a quick feed. It was easy to wean again once teeth were through -my DH would go to her and it only took a few nights each time, so maybe you could do it over a weekend when DH doesn't have to work the next day.