for 3 days now ds has had really stinky runny nappies and is alot more sicky than usual.he is 6 mths old just cut 1st 2 teeth.i have put the nappies down to teething,but this afternoon out of the blue he just threw up,everywhere.then when i gave him his bedtime bottle he threw up dinner and the small amount of milk id given him.i had put it down to teething but now not so sure.any suggestions what to do