I would not be concerned about separation anxiety, for DD2 it started around 5mo. DD2 is still very sensitive for certain things like loud noise, she is terrified of vacuum cleaner and other noisy household machines. Then on the other hand she is fearless when any kind of physical activity is concerned. For the separation anxiety it helped when she got so old that I was able to explain to her what will be happening and when will I be back. She still likes to follow me to the bathroom though smile