I'm feeling like a terrible mother right now so please be gentle!
My DD is two. I have taken her to one baby group in her life, when she was 11 weeks old. She cried pretty much the whole time and eventually I walked out in tears myself. I had PND (probably still do) but I've never been good in group situations anyway.
However, my unsociable-ness was a source of great misery for me growing up. I don't really know what caused it but my mother also suffered PND. Throughout most of school I had no real friends. I even remember wandering around nursery trying to talk to other kids and not really knowing what to do with myself. By junior school I had given up and just sat in the corner of the playground and read through break and lunchtime. At secondary school I would eat in the toilets or go home for lunch until I somehow found a group of friends, and then the same again at college. It's part of the reason I didn't go to university. I now avoid group situations with people I don't know well, even such as family events.
I would hate for DD to grow up like this. Her dad's partner has a child of a similar age and DD is around her when she is at her dad's, and I take her to the park and the library where she will interact with other kids. I work part-time but luckily for me my family and her dad provide childcare, however obviously this is probably not best for DD (I wouldnt be able to afford nursery fees).
I'm worrying because her dad threw DD a birthday party at a play centre with some of his friends' children and his girlfriend's DD's friends. I spoke to someone who was there (I was working) and she told me my DD was mostly playing on her own and wandering around while the other kids played together. I know this may not be particularly worrying as my daughter was one of the youngest there and children don't start to play together properly until a bit older, but it made me cry and now I feel awful. Have I damaged my DD? Do I need to take her to playgroups? She isn't particularly shy, she has a lot of (adult) family and she does interact with other children at the park and library etc, she doesnt hit or bite or snatch toys or anything! Do I need to worry?