Maternity leave - anxiety

Currently on maternity leave with twin girls. Both 4 months and absolute dream. However some days get very lonely, I don't drive or own a car so limited to where I can go. I often go to the shops, lots of walking to parks for coffee and the girls love being outside. Both are sociable when around family and friends. However I do suffer from anxiety and when I see other mums out with mum friends I feel really panicky and get upset. I want to be able to make some mum friends but sometimes socialising is hard 😅😅 anyone else feel like this? Also I do have mild autism so I do struggle to maintain friendships sometimes. I feel like I'm letting my girls down