My DS (6.5 months) has been in creche 4 full days a week since he was just under 5 months. Apart from a few illnesses, he's been fine there and very happy - always smiling when I left him and when I picked him up. The last 2 days that I've left him in the morning, he's started to cry. This morning he even held his arms out towards me as I turned to walk away and I ended up taking him back and giving him an extra cuddle.
He's really not a baby who cries (only cries when he's tired or in pain), so this is very different behaviour for him. The creche say he's fine during the day, eats/sleeps/plays well, and he seems fine in the evenings. Should I be worried, or do you think this could just be the start of separation anxiety?