i'm having similar w/ my 19 w.o! But we only just got into a gd 4hr easy (about a week ago) and he started to sttn. Suddenly he's kicking, crying and half rolling over. I'm not sure if its wind, OS, routine or developmental. It has been going for 4days when before he was sleeping independantly, taking gd naps etc. Now his naps are often 1.15, impossible to extend and he's waking at night. Previously sh/patt workd to calm him, now its v difficult to help him. Sounds like you have similar issues xx