My 16 week old son has started to bob on and off the breast near the end of a feed. He seems very windy and unsettled and is waking more in the night. He started to dribble a month or so ago and puts his hands in his mouth all the time, which I presume is teething. He's really tired and grumpy in the daytime and still won't sleep longer than 45 mins at a time. He is a little constipated and I wonder if all this fussing and fretting is teething related, I don't really know what to expect or how to help him if he's in pain. I have teething powders and Dentinox but they don't seem to be helping.