We've been going to a lovely playgroup since DS (26 months) was 10 months. We go 9-12, four days a week. There is one teacher and lots of engaged parents who do activities with their children, and with other children when the kids are old enough - it is for children from birth up to school age. It is in a quiet suburb, surrounded by leafy gardens, has a big garden, no overstimulating traffic noise or anything. The kids are generally very well-behaved and well looked-after. So it's all kind of ideal...
DS has enjoyed it, and is a kid who likes structure. But last term he began being generally miserable, whiny and shrieky, unsociable, disliking other children, constantly screaming for a breastfeed (we're trying to give up, and have been for ages. It's hard as he's also got severe food allergies and has some kind of sleep disorder). He was fine over Christmas with relatives, loving interacting with grandparents and cousins. But this term he hates playgroup again and just wants to cry and whinge and constantly ask for breastfeeds, which are now down to just before naptime and bedtime. He won't play with other children, wants to spin wheels on tricycles or toy cars, or do his own thing wandering around by himself.
I've spent a lot of time looking up ADOS and MCHAT-R (diagnostic tools for Autism spectrum disorder). I honestly think that when not at playgroup, he pretty clearly isn't autistic. He's bright, chatty, interested in lots of things, happy. But at playgroup he's like a different child. He's miserable.
Is this normal?