My DD has started over the last month to screaming (blood run cold type) and then wriggling around the bed it can last up to 20 mins...he seems to have his eyes closed, if he does wake completely he is inconsolable, he crys and goes ridged wont cuddle in which is unusual for him, doesnt happen every night about 2-3 times per week, i sleep talk and walk as does my sister (who move furniture in her sleep!!) What can be done ?? any ideas??