Tootie, Olivia didn't go through this, but one of the girls in my Mummies group did.....and it drove her mad!

It started around 8 months and on speaking with the MCHN, she thinks it was the "separation anxiety" that is said to be very common at this age (8-10 months to start, 14-15 months to come full circle.)

The MCHN suggested exactly the same things as Mooshie has suggested: LOTS of peak a boo and constant talking even when you are away from him, so he can still understand you are there...........