My DS has recently started waking in the night screaming the house down. At first we thought it was teething but it's been happening for a couple of weeks and he's not like this during the day when he naps. We didn't really have sleep regression at any of the other normal times and have been blessed with a good sleeper since he was tiny so are at a loss as to what to do. We had to do some controlled crying after his 1st bday as he became really unsettled after starting with his childminder. What should we do? Try more cc or just wait for it to pass? If we pick him up, he settles straight away. If we put him down and sit by his bed we can usually get him to go back to sleep but I really don't want to create bad sleep associations! Please offer any suggestions.....we're exhausted and don't know what to do next 
Thanks in advance x