DD (16 weeks) normally very happy, good sleeper and eater; still exclusively bf has had 2 really bad days, lots of bad nappies and wind, not usual self, off her food and distressed crying then today very very bad sickness. Checked temp whic is normal, given CALPOL to settle her but don't know what to do. She's very dribbly and everything goes in the mouth, could this just be teething or am I right to be worried?